1556151155 has 12 divisors (see below), whose sum is σ = 2022076800. Its totient is φ = 1149157152.

The previous prime is 1556151133. The next prime is 1556151161. The reversal of 1556151155 is 5511516551.

It is a de Polignac number, because none of the positive numbers 2^k-1556151155 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 919955 + ... + 921644.

It is an arithmetic number, because the mean of its divisors is an integer number (168506400).

Almost surely, 2^1556151155 is an apocalyptic number.

1556151155 is a deficient number, since it is larger than the sum of its proper divisors (465925645).

1556151155 is a wasteful number, since it uses less digits than its factorization.

1556151155 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1841630 (or 1841617 counting only the distinct ones).

The product of its digits is 18750, while the sum is 35.

The square root of 1556151155 is about 39448.0817657843. The cubic root of 1556151155 is about 1158.8234093928.

The spelling of 1556151155 in words is "one billion, five hundred fifty-six million, one hundred fifty-one thousand, one hundred fifty-five".