156631645643 has 16 divisors (see below), whose sum is σ = 171254304000. Its totient is φ = 142073174880.

The previous prime is 156631645633. The next prime is 156631645649. The reversal of 156631645643 is 346546136651.

It is a cyclic number.

It is not a de Polignac number, because 156631645643 - 2¹⁶ = 156631580107 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 156631645591 and 156631645600.

It is not an unprimeable number, because it can be changed into a prime (156631645649) 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, 13521428 + ... + 13533006.

It is an arithmetic number, because the mean of its divisors is an integer number (10703394000).

Almost surely, 2^156631645643 is an apocalyptic number.

156631645643 is a deficient number, since it is larger than the sum of its proper divisors (14622658357).

156631645643 is a wasteful number, since it uses less digits than its factorization.

156631645643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14242.

The product of its digits is 4665600, while the sum is 50.

The spelling of 156631645643 in words is "one hundred fifty-six billion, six hundred thirty-one million, six hundred forty-five thousand, six hundred forty-three".