5615515566 has 32 divisors (see below), whose sum is σ = 12577198080. Its totient is φ = 1857097368.

The previous prime is 5615515547. The next prime is 5615515579. The reversal of 5615515566 is 6655155165.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 402556 + ... + 416271.

It is an arithmetic number, because the mean of its divisors is an integer number (393037440).

Almost surely, 2^5615515566 is an apocalyptic number.

5615515566 is an abundant number, since it is smaller than the sum of its proper divisors (6961682514).

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

5615515566 is a wasteful number, since it uses less digits than its factorization.

5615515566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 818965 (or 818959 counting only the distinct ones).

The product of its digits is 675000, while the sum is 45.

The square root of 5615515566 is about 74936.7437643243. The cubic root of 5615515566 is about 1777.4465308205.

The spelling of 5615515566 in words is "five billion, six hundred fifteen million, five hundred fifteen thousand, five hundred sixty-six".