7181981903112 has 64 divisors (see below), whose sum is σ = 18840273408000. Its totient is φ = 2277114464064.

The previous prime is 7181981903069. The next prime is 7181981903123. The reversal of 7181981903112 is 2113091891817.

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, 36244312 + ... + 36441927.

It is an arithmetic number, because the mean of its divisors is an integer number (294379272000).

Almost surely, 2^{7181981903112} is an apocalyptic number.

It is an amenable number.

7181981903112 is an abundant number, since it is smaller than the sum of its proper divisors (11658291504888).

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

7181981903112 is a wasteful number, since it uses less digits than its factorization.

7181981903112 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 72686450 (or 72686446 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 51.

The spelling of 7181981903112 in words is "seven trillion, one hundred eighty-one billion, nine hundred eighty-one million, nine hundred three thousand, one hundred twelve".