155981155 has 16 divisors (see below), whose sum is σ = 206784000. Its totient is φ = 112001760.

The previous prime is 155981149. The next prime is 155981183. The reversal of 155981155 is 551189551.

It is not a de Polignac number, because 155981155 - 2⁵ = 155981123 is a prime.

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, 13605 + ... + 22294.

It is an arithmetic number, because the mean of its divisors is an integer number (12924000).

Almost surely, 2^155981155 is an apocalyptic number.

155981155 is a deficient number, since it is larger than the sum of its proper divisors (50802845).

155981155 is a wasteful number, since it uses less digits than its factorization.

155981155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 35994.

The product of its digits is 45000, while the sum is 40.

The square root of 155981155 is about 12489.2415702476. The cubic root of 155981155 is about 538.2995837030.

The spelling of 155981155 in words is "one hundred fifty-five million, nine hundred eighty-one thousand, one hundred fifty-five".