72809026944 has 64 divisors (see below), whose sum is σ = 193486382640. Its totient is φ = 24258707456.

The previous prime is 72809026937. The next prime is 72809026949. The reversal of 72809026944 is 44962090827.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72809026949) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 831124 + ... + 914540.

Almost surely, 2^72809026944 is an apocalyptic number.

It is an amenable number.

72809026944 is an abundant number, since it is smaller than the sum of its proper divisors (120677355696).

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

72809026944 is a wasteful number, since it uses less digits than its factorization.

72809026944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85707 (or 85695 counting only the distinct ones).

The product of its (nonzero) digits is 1741824, while the sum is 51.

The spelling of 72809026944 in words is "seventy-two billion, eight hundred nine million, twenty-six thousand, nine hundred forty-four".