156551556 has 48 divisors (see below), whose sum is σ = 421190784. Its totient is φ = 44330496.

The previous prime is 156551537. The next prime is 156551561. The reversal of 156551556 is 655155651.

156551556 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×156551556² = 49016779372042272, which contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1246 + ... + 17738.

It is an arithmetic number, because the mean of its divisors is an integer number (8774808).

Almost surely, 2^156551556 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 156551556, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (210595392).

156551556 is an abundant number, since it is smaller than the sum of its proper divisors (264639228).

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

156551556 is a wasteful number, since it uses less digits than its factorization.

156551556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16620 (or 16618 counting only the distinct ones).

The product of its digits is 112500, while the sum is 39.

The square root of 156551556 is about 12512.0564257040. The cubic root of 156551556 is about 538.9549472821.

The spelling of 156551556 in words is "one hundred fifty-six million, five hundred fifty-one thousand, five hundred fifty-six".