156137811321 has 16 divisors (see below), whose sum is σ = 214914055680. Its totient is φ = 100727180160.

The previous prime is 156137811301. The next prime is 156137811331. The reversal of 156137811321 is 123118731651.

It is not a de Polignac number, because 156137811321 - 2⁹ = 156137810809 is a prime.

It is a super-2 number, since 2×156137811321² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 156137811321.

It is not an unprimeable number, because it can be changed into a prime (156137811301) 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, 1549741 + ... + 1647413.

It is an arithmetic number, because the mean of its divisors is an integer number (13432128480).

Almost surely, 2^156137811321 is an apocalyptic number.

It is an amenable number.

156137811321 is a deficient number, since it is larger than the sum of its proper divisors (58776244359).

156137811321 is a wasteful number, since it uses less digits than its factorization.

156137811321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 114896.

The product of its digits is 30240, while the sum is 39.

The spelling of 156137811321 in words is "one hundred fifty-six billion, one hundred thirty-seven million, eight hundred eleven thousand, three hundred twenty-one".