15797857790 has 32 divisors (see below), whose sum is σ = 33407500896. Its totient is φ = 5302776960.

The previous prime is 15797857783. The next prime is 15797857843. The reversal of 15797857790 is 9775879751.

It is a Harshad number since it is a multiple of its sum of digits (65).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 5522297 + ... + 5525156.

It is an arithmetic number, because the mean of its divisors is an integer number (1043984403).

Almost surely, 2^15797857790 is an apocalyptic number.

15797857790 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

15797857790 is an abundant number, since it is smaller than the sum of its proper divisors (17609643106).

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

15797857790 is a wasteful number, since it uses less digits than its factorization.

15797857790 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 11047484.

The product of its (nonzero) digits is 38896200, while the sum is 65.

The spelling of 15797857790 in words is "fifteen billion, seven hundred ninety-seven million, eight hundred fifty-seven thousand, seven hundred ninety".