1839650057569 has 3 divisors (see below), whose sum is σ = 1839651413907. Its totient is φ = 1839648701232.

The previous prime is 1839650057513. The next prime is 1839650057591. The reversal of 1839650057569 is 9657500569381.

The square root of 1839650057569 is 1356337.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 35700213025 + 1803949844544 = 188945^2 + 1343112^2 .

It is not a de Polignac number, because 1839650057569 - 2²¹ = 1839647960417 is a prime.

It is a super-2 number, since 2×1839650057569² (a number of 25 digits) contains 22 as substring.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 1839650057569.

It is not an unprimeable number, because it can be changed into a prime (1839650055569) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 678169 + ... + 2034505.

It is an arithmetic number, because the mean of its divisors is an integer number (613217137969).

Almost surely, 2^{1839650057569} is an apocalyptic number.

1839650057569 is the 1356337-th square number.

1839650057569 is the 678169-th centered octagonal number.

It is an amenable number.

1839650057569 is a deficient number, since it is larger than the sum of its proper divisors (1356338).

1839650057569 is an frugal number, since it uses more digits than its factorization.

1839650057569 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2712674 (or 1356337 counting only the distinct ones).

The product of its (nonzero) digits is 61236000, while the sum is 64.

Multiplying 1839650057569 by its sum of digits (64), we get a square (117737603684416 = 10850696²).

The spelling of 1839650057569 in words is "one trillion, eight hundred thirty-nine billion, six hundred fifty million, fifty-seven thousand, five hundred sixty-nine".