72791057840 has 40 divisors (see below), whose sum is σ = 174698544768. Its totient is φ = 28177182720.

The previous prime is 72791057791. The next prime is 72791057863. The reversal of 72791057840 is 4875019727.

It is a happy number.

It is a tau number, because it is divible by the number of its divisors (40).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 14673137 + ... + 14678096.

Almost surely, 2^72791057840 is an apocalyptic number.

It is an amenable number.

72791057840 is an abundant number, since it is smaller than the sum of its proper divisors (101907486928).

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

72791057840 is a wasteful number, since it uses less digits than its factorization.

72791057840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 29351277 (or 29351271 counting only the distinct ones).

The product of its (nonzero) digits is 987840, while the sum is 50.

The spelling of 72791057840 in words is "seventy-two billion, seven hundred ninety-one million, fifty-seven thousand, eight hundred forty".