18082638656 has 56 divisors (see below), whose sum is σ = 39073836000. Its totient is φ = 8270083584.

The previous prime is 18082638641. The next prime is 18082638703. The reversal of 18082638656 is 65683628081.

It is a super-4 number, since 4×18082638656⁴ (a number of 42 digits) contains 4444 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 18082638598 and 18082638607.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 221126 + ... + 291653.

Almost surely, 2^18082638656 is an apocalyptic number.

18082638656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18082638656 is an abundant number, since it is smaller than the sum of its proper divisors (20991197344).

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

18082638656 is a wasteful number, since it uses less digits than its factorization.

18082638656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 512839 (or 512829 counting only the distinct ones).

The product of its (nonzero) digits is 3317760, while the sum is 53.

The spelling of 18082638656 in words is "eighteen billion, eighty-two million, six hundred thirty-eight thousand, six hundred fifty-six".