155618980 has 24 divisors (see below), whose sum is σ = 356509440. Its totient is φ = 56588640.

The previous prime is 155618963. The next prime is 155618993. The reversal of 155618980 is 89816551.

It is a super-4 number, since 4×155618980⁴ (a number of 34 digits) contains 4444 as substring.

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, 353460 + ... + 353899.

It is an arithmetic number, because the mean of its divisors is an integer number (14854560).

Almost surely, 2^155618980 is an apocalyptic number.

155618980 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

155618980 is an abundant number, since it is smaller than the sum of its proper divisors (200890460).

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

155618980 is a wasteful number, since it uses less digits than its factorization.

155618980 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 707379 (or 707377 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 43.

The square root of 155618980 is about 12474.7336644916. The cubic root of 155618980 is about 537.8826321827.

The spelling of 155618980 in words is "one hundred fifty-five million, six hundred eighteen thousand, nine hundred eighty".