56004510161 has 4 divisors (see below), whose sum is σ = 56008469172. Its totient is φ = 56000551152.

The previous prime is 56004510157. The next prime is 56004510173. The reversal of 56004510161 is 16101540065.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 29870554561 + 26133955600 = 172831^2 + 161660^2 .

It is a cyclic number.

It is not a de Polignac number, because 56004510161 - 2² = 56004510157 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (56004510061) 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, 1958210 + ... + 1986603.

It is an arithmetic number, because the mean of its divisors is an integer number (14002117293).

Almost surely, 2^56004510161 is an apocalyptic number.

It is an amenable number.

56004510161 is a deficient number, since it is larger than the sum of its proper divisors (3959011).

56004510161 is a wasteful number, since it uses less digits than its factorization.

56004510161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3959010.

The product of its (nonzero) digits is 3600, while the sum is 29.

The spelling of 56004510161 in words is "fifty-six billion, four million, five hundred ten thousand, one hundred sixty-one".