5115155665566 has 64 divisors (see below), whose sum is σ = 10332463389696. Its totient is φ = 1688137728000.

The previous prime is 5115155665553. The next prime is 5115155665589. The reversal of 5115155665566 is 6655665515115.

It is a Curzon number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 174976171 + ... + 175005401.

It is an arithmetic number, because the mean of its divisors is an integer number (161444740464).

Almost surely, 2^{5115155665566} is an apocalyptic number.

5115155665566 is an abundant number, since it is smaller than the sum of its proper divisors (5217307724130).

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

5115155665566 is a wasteful number, since it uses less digits than its factorization.

5115155665566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30177.

The product of its digits is 20250000, while the sum is 57.

The spelling of 5115155665566 in words is "five trillion, one hundred fifteen billion, one hundred fifty-five million, six hundred sixty-five thousand, five hundred sixty-six".