72921008064 has 56 divisors (see below), whose sum is σ = 192958677328. Its totient is φ = 24304250880.

The previous prime is 72921008063. The next prime is 72921008203. The reversal of 72921008064 is 46080012927.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72921008063) 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, 2369544 + ... + 2400120.

Almost surely, 2^72921008064 is an apocalyptic number.

It is an amenable number.

72921008064 is an abundant number, since it is smaller than the sum of its proper divisors (120037669264).

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

72921008064 is a wasteful number, since it uses less digits than its factorization.

72921008064 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 43013 (or 43003 counting only the distinct ones).

The product of its (nonzero) digits is 48384, while the sum is 39.

The spelling of 72921008064 in words is "seventy-two billion, nine hundred twenty-one million, eight thousand, sixty-four".