72111987072 has 64 divisors (see below), whose sum is σ = 212830527600. Its totient is φ = 24037327872.

The previous prime is 72111987049. The next prime is 72111987083. The reversal of 72111987072 is 27078911127.

It is a tau number, because it is divible by the number of its divisors (64).

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, 10429413 + ... + 10436324.

Almost surely, 2^72111987072 is an apocalyptic number.

72111987072 is a gapful number since it is divisible by the number (72) formed by its first and last digit.

It is an amenable number.

72111987072 is an abundant number, since it is smaller than the sum of its proper divisors (140718540528).

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

72111987072 is a wasteful number, since it uses less digits than its factorization.

72111987072 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20865760 (or 20865742 counting only the distinct ones).

The product of its (nonzero) digits is 98784, while the sum is 45.

The spelling of 72111987072 in words is "seventy-two billion, one hundred eleven million, nine hundred eighty-seven thousand, seventy-two".