15856153297397 has 8 divisors (see below), whose sum is σ = 18491140872000. Its totient is φ = 13590988540332.

The previous prime is 15856153297339. The next prime is 15856153297421. The reversal of 15856153297397 is 79379235165851.

It is not a de Polignac number, because 15856153297397 - 2²⁴ = 15856136520181 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 15856153297397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15856153297697) 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 7 ways as a sum of consecutive naturals, for example, 23113925747 + ... + 23113926432.

It is an arithmetic number, because the mean of its divisors is an integer number (2311392609000).

Almost surely, 2^{15856153297397} is an apocalyptic number.

It is an amenable number.

15856153297397 is a deficient number, since it is larger than the sum of its proper divisors (2634987574603).

15856153297397 is an frugal number, since it uses more digits than its factorization.

15856153297397 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 46227852200 (or 46227852186 counting only the distinct ones).

The product of its digits is 428652000, while the sum is 71.

The spelling of 15856153297397 in words is "fifteen trillion, eight hundred fifty-six billion, one hundred fifty-three million, two hundred ninety-seven thousand, three hundred ninety-seven".