155601055620 has 48 divisors (see below), whose sum is σ = 484092174720. Its totient is φ = 41493614688.

The previous prime is 155601055609. The next prime is 155601055667. The reversal of 155601055620 is 26550106551.

155601055620 is a `hidden beast` number, since 15 + 5 + 6 + 0 + 10 + 5 + 5 + 620 = 666.

It is a Harshad number since it is a multiple of its sum of digits (36).

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, 144074512 + ... + 144075591.

It is an arithmetic number, because the mean of its divisors is an integer number (10085253640).

Almost surely, 2^155601055620 is an apocalyptic number.

155601055620 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155601055620 is an abundant number, since it is smaller than the sum of its proper divisors (328491119100).

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

155601055620 is a wasteful number, since it uses less digits than its factorization.

155601055620 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 288150121 (or 288150113 counting only the distinct ones).

The product of its (nonzero) digits is 45000, while the sum is 36.

The spelling of 155601055620 in words is "one hundred fifty-five billion, six hundred one million, fifty-five thousand, six hundred twenty".