1850353516729 has 3 divisors (see below), whose sum is σ = 1850354877007. Its totient is φ = 1850352156452.

The previous prime is 1850353516717. The next prime is 1850353516757. The reversal of 1850353516729 is 9276153530581.

It is a happy number.

The square root of 1850353516729 is 1360277.

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., 1698212954025 + 152140562704 = 1303155^2 + 390052^2 .

It is not a de Polignac number, because 1850353516729 - 2¹³ = 1850353508537 is a prime.

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 1850353516729.

It is not an unprimeable number, because it can be changed into a prime (1850353516799) 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, 680139 + ... + 2040415.

Almost surely, 2^{1850353516729} is an apocalyptic number.

1850353516729 is the 1360277-th square number.

1850353516729 is the 680139-th centered octagonal number.

It is an amenable number.

1850353516729 is a deficient number, since it is larger than the sum of its proper divisors (1360278).

1850353516729 is an frugal number, since it uses more digits than its factorization.

1850353516729 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2720554 (or 1360277 counting only the distinct ones).

The product of its (nonzero) digits is 6804000, while the sum is 55.

The spelling of 1850353516729 in words is "one trillion, eight hundred fifty billion, three hundred fifty-three million, five hundred sixteen thousand, seven hundred twenty-nine".