18253579656 has 64 divisors (see below), whose sum is σ = 49157478720. Its totient is φ = 5614974720.

The previous prime is 18253579577. The next prime is 18253579657. The reversal of 18253579656 is 65697535281.

It is a junction number, because it is equal to n+sod(n) for n = 18253579596 and 18253579605.

It is not an unprimeable number, because it can be changed into a prime (18253579657) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1870566 + ... + 1880298.

It is an arithmetic number, because the mean of its divisors is an integer number (768085605).

Almost surely, 2^18253579656 is an apocalyptic number.

It is an amenable number.

18253579656 is an abundant number, since it is smaller than the sum of its proper divisors (30903899064).

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

18253579656 is a wasteful number, since it uses less digits than its factorization.

18253579656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15766 (or 15762 counting only the distinct ones).

The product of its digits is 13608000, while the sum is 57.

The spelling of 18253579656 in words is "eighteen billion, two hundred fifty-three million, five hundred seventy-nine thousand, six hundred fifty-six".