15789921253397 has 16 divisors (see below), whose sum is σ = 15883716625920. Its totient is φ = 15696367717632.

The previous prime is 15789921253363. The next prime is 15789921253453. The reversal of 15789921253397 is 79335212998751.

It is a cyclic number.

It is not a de Polignac number, because 15789921253397 - 2⁶ = 15789921253333 is a prime.

It is a super-2 number, since 2×15789921253397² (a number of 27 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 15789921253397.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (15789921255397) 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, 1026444968 + ... + 1026460350.

It is an arithmetic number, because the mean of its divisors is an integer number (992732289120).

Almost surely, 2^{15789921253397} is an apocalyptic number.

It is an amenable number.

15789921253397 is a deficient number, since it is larger than the sum of its proper divisors (93795372523).

15789921253397 is a wasteful number, since it uses less digits than its factorization.

15789921253397 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22852.

The product of its digits is 257191200, while the sum is 71.

The spelling of 15789921253397 in words is "fifteen trillion, seven hundred eighty-nine billion, nine hundred twenty-one million, two hundred fifty-three thousand, three hundred ninety-seven".