156404023400 has 24 divisors (see below), whose sum is σ = 363639354870. Its totient is φ = 62561609280.

The previous prime is 156404023397. The next prime is 156404023421. The reversal of 156404023400 is 4320404651.

It can be written as a sum of positive squares in 3 ways, for example, as 63553401604 + 92850621796 = 252098^2 + 304714^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 391009859 + ... + 391010258.

Almost surely, 2^156404023400 is an apocalyptic number.

156404023400 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

156404023400 is an abundant number, since it is smaller than the sum of its proper divisors (207235331470).

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

156404023400 is a wasteful number, since it uses less digits than its factorization.

156404023400 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 782020133 (or 782020124 counting only the distinct ones).

The product of its (nonzero) digits is 11520, while the sum is 29.

The spelling of 156404023400 in words is "one hundred fifty-six billion, four hundred four million, twenty-three thousand, four hundred".