18553562156 has 6 divisors (see below), whose sum is σ = 32468733780. Its totient is φ = 9276781076.

The previous prime is 18553562141. The next prime is 18553562173. The reversal of 18553562156 is 65126535581.

It is a self number, because there is not a number n which added to its sum of digits gives 18553562156.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2319195266 + ... + 2319195273.

It is an arithmetic number, because the mean of its divisors is an integer number (5411455630).

Almost surely, 2^18553562156 is an apocalyptic number.

It is an amenable number.

18553562156 is a deficient number, since it is larger than the sum of its proper divisors (13915171624).

18553562156 is a wasteful number, since it uses less digits than its factorization.

18553562156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4638390543 (or 4638390541 counting only the distinct ones).

The product of its digits is 1080000, while the sum is 47.

The spelling of 18553562156 in words is "eighteen billion, five hundred fifty-three million, five hundred sixty-two thousand, one hundred fifty-six".