655899567122 has 18 divisors (see below), whose sum is σ = 987105387879. Its totient is φ = 326868011820.

The previous prime is 655899567107. The next prime is 655899567151. The reversal of 655899567122 is 221765998556.

It can be written as a sum of positive squares in only one way, i.e., 327949783561 + 327949783561 = 572669^2 + 572669^2 .

It is an ABA number since it can be written as A⋅B^A, here for A=2, B=572669.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 434082347 + ... + 434083857.

Almost surely, 2^655899567122 is an apocalyptic number.

655899567122 is a deficient number, since it is larger than the sum of its proper divisors (331205820757).

655899567122 is an frugal number, since it uses more digits than its factorization.

655899567122 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3782 (or 1892 counting only the distinct ones).

The product of its digits is 81648000, while the sum is 65.

The spelling of 655899567122 in words is "six hundred fifty-five billion, eight hundred ninety-nine million, five hundred sixty-seven thousand, one hundred twenty-two".