656216011161 has 12 divisors (see below), whose sum is σ = 1003624487892. Its totient is φ = 411743379456.

The previous prime is 656216011103. The next prime is 656216011163. The reversal of 656216011161 is 161110612656.

656216011161 is a `hidden beast` number, since 6 + 5 + 621 + 6 + 0 + 11 + 16 + 1 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 331264709136 + 324951302025 = 575556^2 + 570045^2 .

It is not a de Polignac number, because 656216011161 - 2⁶ = 656216011097 is a prime.

It is a super-3 number, since 3×656216011161³ (a number of 36 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (656216011163) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2144496616 + ... + 2144496921.

It is an arithmetic number, because the mean of its divisors is an integer number (83635373991).

Almost surely, 2^656216011161 is an apocalyptic number.

It is an amenable number.

656216011161 is a deficient number, since it is larger than the sum of its proper divisors (347408476731).

656216011161 is a wasteful number, since it uses less digits than its factorization.

656216011161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4288993560 (or 4288993557 counting only the distinct ones).

The product of its (nonzero) digits is 12960, while the sum is 36.

The spelling of 656216011161 in words is "six hundred fifty-six billion, two hundred sixteen million, eleven thousand, one hundred sixty-one".