656000051129 has 2 divisors, whose sum is σ = 656000051130. Its totient is φ = 656000051128.

The previous prime is 656000051051. The next prime is 656000051153. The reversal of 656000051129 is 921150000656.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 478967805625 + 177032245504 = 692075^2 + 420752^2 .

It is a cyclic number.

It is not a de Polignac number, because 656000051129 - 2²⁰ = 655999002553 is a prime.

It is a super-2 number, since 2×656000051129² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (656000051029) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 328000025564 + 328000025565.

It is an arithmetic number, because the mean of its divisors is an integer number (328000025565).

Almost surely, 2^656000051129 is an apocalyptic number.

It is an amenable number.

656000051129 is a deficient number, since it is larger than the sum of its proper divisors (1).

656000051129 is an equidigital number, since it uses as much as digits as its factorization.

656000051129 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 16200, while the sum is 35.

The spelling of 656000051129 in words is "six hundred fifty-six billion, fifty-one thousand, one hundred twenty-nine".