18880158816 has 72 divisors (see below), whose sum is σ = 53890265520. Its totient is φ = 6269965056.

The previous prime is 18880158799. The next prime is 18880158827. The reversal of 18880158816 is 61885108881.

It is a tau number, because it is divible by the number of its divisors (72).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 44380 + ... + 199323.

It is an arithmetic number, because the mean of its divisors is an integer number (748475910).

Almost surely, 2^18880158816 is an apocalyptic number.

18880158816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

18880158816 is an abundant number, since it is smaller than the sum of its proper divisors (35010106704).

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

18880158816 is a wasteful number, since it uses less digits than its factorization.

18880158816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 243988 (or 243977 counting only the distinct ones).

The product of its (nonzero) digits is 983040, while the sum is 54.

The spelling of 18880158816 in words is "eighteen billion, eight hundred eighty million, one hundred fifty-eight thousand, eight hundred sixteen".