155799056 has 80 divisors (see below), whose sum is σ = 371785728. Its totient is φ = 61776000.

The previous prime is 155799047. The next prime is 155799071. The reversal of 155799056 is 650997551.

It is a super-2 number, since 2×155799056² = 48546691700982272, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 155799056.

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, 78881 + ... + 80831.

Almost surely, 2^155799056 is an apocalyptic number.

155799056 is a gapful number since it is divisible by the number (16) 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 155799056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (185892864).

155799056 is an abundant number, since it is smaller than the sum of its proper divisors (215986672).

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

155799056 is a wasteful number, since it uses less digits than its factorization.

155799056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2020 (or 2014 counting only the distinct ones).

The product of its (nonzero) digits is 425250, while the sum is 47.

The square root of 155799056 is about 12481.9492067545. The cubic root of 155799056 is about 538.0900242290.

The spelling of 155799056 in words is "one hundred fifty-five million, seven hundred ninety-nine thousand, fifty-six".