18256999880460 has 384 divisors, whose sum is σ = 57414873600000. Its totient is φ = 4297334440960.

The previous prime is 18256999880407. The next prime is 18256999880473. The reversal of 18256999880460 is 6408899965281.

It is a super-4 number, since 4×18256999880460⁴ (a number of 54 digits) contains 4444 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 1038559951 + ... + 1038577529.

It is an arithmetic number, because the mean of its divisors is an integer number (149517900000).

Almost surely, 2^{18256999880460} is an apocalyptic number.

18256999880460 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 18256999880460, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (28707436800000).

18256999880460 is an abundant number, since it is smaller than the sum of its proper divisors (39157873719540).

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

18256999880460 is a wasteful number, since it uses less digits than its factorization.

18256999880460 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17989 (or 17987 counting only the distinct ones).

The product of its (nonzero) digits is 537477120, while the sum is 75.

The spelling of 18256999880460 in words is "eighteen trillion, two hundred fifty-six billion, nine hundred ninety-nine million, eight hundred eighty thousand, four hundred sixty".