15516566055 has 24 divisors (see below), whose sum is σ = 27351239760. Its totient is φ = 8135237760.

The previous prime is 15516566047. The next prime is 15516566069. The reversal of 15516566055 is 55066561551.

It is not a de Polignac number, because 15516566055 - 2³ = 15516566047 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a self number, because there is not a number n which added to its sum of digits gives 15516566055.

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, 2919486 + ... + 2924795.

It is an arithmetic number, because the mean of its divisors is an integer number (1139634990).

Almost surely, 2^15516566055 is an apocalyptic number.

15516566055 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

15516566055 is a deficient number, since it is larger than the sum of its proper divisors (11834673705).

15516566055 is a wasteful number, since it uses less digits than its factorization.

15516566055 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5844351 (or 5844348 counting only the distinct ones).

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

The spelling of 15516566055 in words is "fifteen billion, five hundred sixteen million, five hundred sixty-six thousand, fifty-five".