72867924640 has 48 divisors (see below), whose sum is σ = 196743399552. Its totient is φ = 24983288064.

The previous prime is 72867924631. The next prime is 72867924671. The reversal of 72867924640 is 4642976827.

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, 32529204 + ... + 32531443.

It is an arithmetic number, because the mean of its divisors is an integer number (4098820824).

Almost surely, 2^72867924640 is an apocalyptic number.

72867924640 is a gapful number since it is divisible by the number (70) formed by its first and last digit.

It is an amenable number.

72867924640 is an abundant number, since it is smaller than the sum of its proper divisors (123875474912).

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

72867924640 is a wasteful number, since it uses less digits than its factorization.

72867924640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 65060669 (or 65060661 counting only the distinct ones).

The product of its (nonzero) digits is 8128512, while the sum is 55.

The spelling of 72867924640 in words is "seventy-two billion, eight hundred sixty-seven million, nine hundred twenty-four thousand, six hundred forty".