156391560 has 320 divisors, whose sum is σ = 585446400. Its totient is φ = 37200384.

The previous prime is 156391553. The next prime is 156391561. The reversal of 156391560 is 65193651.

156391560 is a `hidden beast` number, since 1 + 5 + 6 + 3 + 91 + 560 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

It is not an unprimeable number, because it can be changed into a prime (156391561) by changing a digit.

It is a polite number, since it can be written in 79 ways as a sum of consecutive naturals, for example, 1979601 + ... + 1979679.

It is an arithmetic number, because the mean of its divisors is an integer number (1829520).

Almost surely, 2^156391560 is an apocalyptic number.

156391560 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 156391560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (292723200).

156391560 is an abundant number, since it is smaller than the sum of its proper divisors (429054840).

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

156391560 is a wasteful number, since it uses less digits than its factorization.

156391560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 162 (or 149 counting only the distinct ones).

The product of its (nonzero) digits is 24300, while the sum is 36.

The square root of 156391560 is about 12505.6611180697. The cubic root of 156391560 is about 538.7712803577.

The spelling of 156391560 in words is "one hundred fifty-six million, three hundred ninety-one thousand, five hundred sixty".