155906856 has 256 divisors, whose sum is σ = 535296000. Its totient is φ = 41570496.

The previous prime is 155906827. The next prime is 155906869. The reversal of 155906856 is 658609551.

It is a happy number.

155906856 is a `hidden beast` number, since 1 + 5 + 590 + 6 + 8 + 56 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 2326935 + ... + 2327001.

It is an arithmetic number, because the mean of its divisors is an integer number (2091000).

Almost surely, 2^155906856 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 155906856, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267648000).

155906856 is an abundant number, since it is smaller than the sum of its proper divisors (379389144).

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

155906856 is an equidigital number, since it uses as much as digits as its factorization.

155906856 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 120 (or 98 counting only the distinct ones).

The product of its (nonzero) digits is 324000, while the sum is 45.

The square root of 155906856 is about 12486.2666958543. The cubic root of 155906856 is about 538.2141001440.

The spelling of 155906856 in words is "one hundred fifty-five million, nine hundred six thousand, eight hundred fifty-six".