613612505556 has 72 divisors (see below), whose sum is σ = 1652776692840. Its totient is φ = 191279702016.

The previous prime is 613612505549. The next prime is 613612505579. The reversal of 613612505556 is 655505216316.

613612505556 is a `hidden beast` number, since 6 + 1 + 36 + 12 + 50 + 5 + 556 = 666.

It can be written as a sum of positive squares in 4 ways, for example, as 92738520900 + 520873984656 = 304530^2 + 721716^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 3097021 + ... + 3289188.

It is an arithmetic number, because the mean of its divisors is an integer number (22955231845).

Almost surely, 2^613612505556 is an apocalyptic number.

It is an amenable number.

613612505556 is an abundant number, since it is smaller than the sum of its proper divisors (1039164187284).

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

613612505556 is a wasteful number, since it uses less digits than its factorization.

613612505556 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6386393 (or 6386388 counting only the distinct ones).

The product of its (nonzero) digits is 810000, while the sum is 45.

The spelling of 613612505556 in words is "six hundred thirteen billion, six hundred twelve million, five hundred five thousand, five hundred fifty-six".