156641856 has 56 divisors (see below), whose sum is σ = 473659200. Its totient is φ = 44754432.

The previous prime is 156641851. The next prime is 156641857. The reversal of 156641856 is 658146651.

It is a tau number, because it is divible by the number of its divisors (56).

It is a super-2 number, since 2×156641856² = 49073342102249472, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (42).

It is not an unprimeable number, because it can be changed into a prime (156641851) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 56931 + ... + 59618.

It is an arithmetic number, because the mean of its divisors is an integer number (8458200).

Almost surely, 2^156641856 is an apocalyptic number.

156641856 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

156641856 is an abundant number, since it is smaller than the sum of its proper divisors (317017344).

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

156641856 is a wasteful number, since it uses less digits than its factorization.

156641856 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 116571 (or 116561 counting only the distinct ones).

The product of its digits is 172800, while the sum is 42.

The square root of 156641856 is about 12515.6644250315. The cubic root of 156641856 is about 539.0585516552.

The spelling of 156641856 in words is "one hundred fifty-six million, six hundred forty-one thousand, eight hundred fifty-six".