556155161 has 4 divisors (see below), whose sum is σ = 556284672. Its totient is φ = 556025652.

The previous prime is 556155133. The next prime is 556155179. The reversal of 556155161 is 161551655.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-556155161 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (556155101) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 58085 + ... + 66978.

It is an arithmetic number, because the mean of its divisors is an integer number (139071168).

Almost surely, 2^556155161 is an apocalyptic number.

It is an amenable number.

556155161 is a deficient number, since it is larger than the sum of its proper divisors (129511).

556155161 is a wasteful number, since it uses less digits than its factorization.

556155161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129510.

The product of its digits is 22500, while the sum is 35.

The square root of 556155161 is about 23582.9421616557. The cubic root of 556155161 is about 822.3663359443.

The spelling of 556155161 in words is "five hundred fifty-six million, one hundred fifty-five thousand, one hundred sixty-one".