18456681581016 has 64 divisors (see below), whose sum is σ = 52736227161600. Its totient is φ = 5273052473088.

The previous prime is 18456681580999. The next prime is 18456681581057. The reversal of 18456681581016 is 61018518665481.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 156165 + ... + 6077643.

It is an arithmetic number, because the mean of its divisors is an integer number (824003549400).

Almost surely, 2^{18456681581016} is an apocalyptic number.

It is an amenable number.

18456681581016 is an abundant number, since it is smaller than the sum of its proper divisors (34279545580584).

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

18456681581016 is a wasteful number, since it uses less digits than its factorization.

18456681581016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5940048 (or 5940044 counting only the distinct ones).

The product of its (nonzero) digits is 11059200, while the sum is 60.

The spelling of 18456681581016 in words is "eighteen trillion, four hundred fifty-six billion, six hundred eighty-one million, five hundred eighty-one thousand, sixteen".