18552056553 has 48 divisors (see below), whose sum is σ = 27461790720. Its totient is φ = 12065974272.

The previous prime is 18552056543. The next prime is 18552056563. The reversal of 18552056553 is 35565025581.

It is a happy number.

18552056553 is a `hidden beast` number, since 1 + 85 + 5 + 2 + 0 + 565 + 5 + 3 = 666.

It is an interprime number because it is at equal distance from previous prime (18552056543) and next prime (18552056563).

It is not a de Polignac number, because 18552056553 - 2⁸ = 18552056297 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 18552056499 and 18552056508.

It is not an unprimeable number, because it can be changed into a prime (18552056543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 38730568 + ... + 38731046.

It is an arithmetic number, because the mean of its divisors is an integer number (572120640).

Almost surely, 2^18552056553 is an apocalyptic number.

It is an amenable number.

18552056553 is a deficient number, since it is larger than the sum of its proper divisors (8909734167).

18552056553 is a wasteful number, since it uses less digits than its factorization.

18552056553 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1078 (or 1075 counting only the distinct ones).

The product of its (nonzero) digits is 900000, while the sum is 45.

The spelling of 18552056553 in words is "eighteen billion, five hundred fifty-two million, fifty-six thousand, five hundred fifty-three".