55604213613 has 20 divisors (see below), whose sum is σ = 89452554268. Its totient is φ = 34217976960.

The previous prime is 55604213611. The next prime is 55604213617. The reversal of 55604213613 is 31631240655.

55604213613 is a `hidden beast` number, since 5 + 5 + 604 + 2 + 1 + 36 + 13 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 22595501124 + 33008712489 = 150318^2 + 181683^2 .

It is not a de Polignac number, because 55604213613 - 2¹ = 55604213611 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (55604213611) by changing a digit.

It is a polite number, since it can be written in 19 ways as a sum of consecutive naturals, for example, 26401708 + ... + 26403813.

Almost surely, 2^55604213613 is an apocalyptic number.

It is an amenable number.

55604213613 is a deficient number, since it is larger than the sum of its proper divisors (33848340655).

55604213613 is a wasteful number, since it uses less digits than its factorization.

55604213613 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52805546 (or 52805537 counting only the distinct ones).

The product of its (nonzero) digits is 64800, while the sum is 36.

The spelling of 55604213613 in words is "fifty-five billion, six hundred four million, two hundred thirteen thousand, six hundred thirteen".