15764439768 has 64 divisors (see below), whose sum is σ = 49135921920. Its totient is φ = 4094659200.

The previous prime is 15764439763. The next prime is 15764439871. The reversal of 15764439768 is 86793446751.

It is a super-2 number, since 2×15764439768² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15764439763) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4263423 + ... + 4267118.

It is an arithmetic number, because the mean of its divisors is an integer number (767748780).

Almost surely, 2^15764439768 is an apocalyptic number.

It is an amenable number.

15764439768 is an abundant number, since it is smaller than the sum of its proper divisors (33371482152).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

15764439768 is a wasteful number, since it uses less digits than its factorization.

15764439768 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8530568 (or 8530564 counting only the distinct ones).

The product of its digits is 30481920, while the sum is 60.

The spelling of 15764439768 in words is "fifteen billion, seven hundred sixty-four million, four hundred thirty-nine thousand, seven hundred sixty-eight".