156215440020 has 24 divisors (see below), whose sum is σ = 437403232224. Its totient is φ = 41657450656.

The previous prime is 156215439979. The next prime is 156215440063. The reversal of 156215440020 is 20044512651.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is a self number, because there is not a number n which added to its sum of digits gives 156215440020.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1301795274 + ... + 1301795393.

It is an arithmetic number, because the mean of its divisors is an integer number (18225134676).

Almost surely, 2^156215440020 is an apocalyptic number.

156215440020 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156215440020 is an abundant number, since it is smaller than the sum of its proper divisors (281187792204).

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

156215440020 is a wasteful number, since it uses less digits than its factorization.

156215440020 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2603590679 (or 2603590677 counting only the distinct ones).

The product of its (nonzero) digits is 9600, while the sum is 30.

Adding to 156215440020 its reverse (20044512651), we get a palindrome (176259952671).

The spelling of 156215440020 in words is "one hundred fifty-six billion, two hundred fifteen million, four hundred forty thousand, twenty".