55616605506 has 64 divisors (see below), whose sum is σ = 154089308160. Its totient is φ = 14445870480.

The previous prime is 55616605501. The next prime is 55616605523. The reversal of 55616605506 is 60550661655.

It is not an unprimeable number, because it can be changed into a prime (55616605501) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6683746 + ... + 6692061.

It is an arithmetic number, because the mean of its divisors is an integer number (2407645440).

Almost surely, 2^55616605506 is an apocalyptic number.

55616605506 is an abundant number, since it is smaller than the sum of its proper divisors (98472702654).

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

55616605506 is a wasteful number, since it uses less digits than its factorization.

55616605506 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13375836 (or 13375830 counting only the distinct ones).

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

The spelling of 55616605506 in words is "fifty-five billion, six hundred sixteen million, six hundred five thousand, five hundred six".