156623725440 has 2688 divisors, whose sum is σ = 768664753920. Its totient is φ = 30098718720.

The previous prime is 156623725403. The next prime is 156623725463. The reversal of 156623725440 is 44527326651.

156623725440 is a `hidden beast` number, since 1 + 566 + 2 + 37 + 2 + 54 + 4 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (2688).

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 5052378225 + ... + 5052378255.

It is an arithmetic number, because the mean of its divisors is an integer number (285961590).

Almost surely, 2^156623725440 is an apocalyptic number.

156623725440 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156623725440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (384332376960).

156623725440 is an abundant number, since it is smaller than the sum of its proper divisors (612041028480).

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

156623725440 is a wasteful number, since it uses less digits than its factorization.

156623725440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 112 (or 78 counting only the distinct ones).

The product of its (nonzero) digits is 1209600, while the sum is 45.

The spelling of 156623725440 in words is "one hundred fifty-six billion, six hundred twenty-three million, seven hundred twenty-five thousand, four hundred forty".