155818056 has 64 divisors (see below), whose sum is σ = 419515200. Its totient is φ = 48048128.

The previous prime is 155818043. The next prime is 155818067. The reversal of 155818056 is 650818551.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20836 + ... + 27308.

It is an arithmetic number, because the mean of its divisors is an integer number (6554925).

Almost surely, 2^155818056 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 155818056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (209757600).

155818056 is an abundant number, since it is smaller than the sum of its proper divisors (263697144).

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

155818056 is a wasteful number, since it uses less digits than its factorization.

155818056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6558 (or 6554 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 39.

The square root of 155818056 is about 12482.7102826269. The cubic root of 155818056 is about 538.1118970507. Note that the first 3 decimals are identical.

The spelling of 155818056 in words is "one hundred fifty-five million, eight hundred eighteen thousand, fifty-six".