1938059785769 has 4 divisors (see below), whose sum is σ = 1938176827860. Its totient is φ = 1937942743680.

The previous prime is 1938059785751. The next prime is 1938059785789. The reversal of 1938059785769 is 9675879508391.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 66876546025 + 1871183239744 = 258605^2 + 1367912^2 .

It is a cyclic number.

It is not a de Polignac number, because 1938059785769 - 2³² = 1933764818473 is a prime.

It is a super-2 number, since 2×1938059785769² (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 1938059785769.

It is not an unprimeable number, because it can be changed into a prime (1938059785789) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58496204 + ... + 58529325.

It is an arithmetic number, because the mean of its divisors is an integer number (484544206965).

Almost surely, 2^{1938059785769} is an apocalyptic number.

It is an amenable number.

1938059785769 is a deficient number, since it is larger than the sum of its proper divisors (117042091).

1938059785769 is a wasteful number, since it uses less digits than its factorization.

1938059785769 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 117042090.

The product of its (nonzero) digits is 1028764800, while the sum is 77.

The spelling of 1938059785769 in words is "one trillion, nine hundred thirty-eight billion, fifty-nine million, seven hundred eighty-five thousand, seven hundred sixty-nine".