616697308872 has 24 divisors (see below), whose sum is σ = 1670221878390. Its totient is φ = 205565769600.

The previous prime is 616697308861. The next prime is 616697308937. The reversal of 616697308872 is 278803796616.

616697308872 is a `hidden beast` number, since 6 + 166 + 97 + 308 + 87 + 2 = 666.

It can be written as a sum of positive squares in only one way, i.e., 467109370116 + 149587938756 = 683454^2 + 386766^2 .

It is a tau number, because it is divible by the number of its divisors (24).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 4282620129 + ... + 4282620272.

Almost surely, 2^616697308872 is an apocalyptic number.

It is an amenable number.

616697308872 is an abundant number, since it is smaller than the sum of its proper divisors (1053524569518).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

616697308872 is a wasteful number, since it uses less digits than its factorization.

616697308872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8565240413 (or 8565240406 counting only the distinct ones).

The product of its (nonzero) digits is 36578304, while the sum is 63.

The spelling of 616697308872 in words is "six hundred sixteen billion, six hundred ninety-seven million, three hundred eight thousand, eight hundred seventy-two".