56021551161 has 16 divisors (see below), whose sum is σ = 75920117760. Its totient is φ = 36738833040.

The previous prime is 56021551133. The next prime is 56021551169. The reversal of 56021551161 is 16115512065.

It is not a de Polignac number, because 56021551161 - 2¹⁸ = 56021289017 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (56021551169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 371895 + ... + 500348.

It is an arithmetic number, because the mean of its divisors is an integer number (4745007360).

Almost surely, 2^56021551161 is an apocalyptic number.

It is an amenable number.

56021551161 is a deficient number, since it is larger than the sum of its proper divisors (19898566599).

56021551161 is a wasteful number, since it uses less digits than its factorization.

56021551161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 872596.

The product of its (nonzero) digits is 9000, while the sum is 33.

The spelling of 56021551161 in words is "fifty-six billion, twenty-one million, five hundred fifty-one thousand, one hundred sixty-one".