155805056 has 64 divisors (see below), whose sum is σ = 340761600. Its totient is φ = 70371840.

The previous prime is 155805049. The next prime is 155805071. The reversal of 155805056 is 650508551.

It is a tau number, because it is divible by the number of its divisors (64).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 336281 + ... + 336743.

It is an arithmetic number, because the mean of its divisors is an integer number (5324400).

Almost surely, 2^155805056 is an apocalyptic number.

155805056 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 155805056, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170380800).

155805056 is an abundant number, since it is smaller than the sum of its proper divisors (184956544).

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

155805056 is a wasteful number, since it uses less digits than its factorization.

155805056 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 727 (or 715 counting only the distinct ones).

The product of its (nonzero) digits is 30000, while the sum is 35.

The square root of 155805056 is about 12482.1895515170. The cubic root of 155805056 is about 538.0969316280.

The spelling of 155805056 in words is "one hundred fifty-five million, eight hundred five thousand, fifty-six".