72713531064 has 64 divisors (see below), whose sum is σ = 184904244000. Its totient is φ = 23824060416.

The previous prime is 72713531057. The next prime is 72713531081. The reversal of 72713531064 is 46013531727.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 442512 + ... + 584160.

Almost surely, 2^72713531064 is an apocalyptic number.

It is an amenable number.

72713531064 is an abundant number, since it is smaller than the sum of its proper divisors (112190712936).

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

72713531064 is a wasteful number, since it uses less digits than its factorization.

72713531064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142024 (or 142020 counting only the distinct ones).

The product of its (nonzero) digits is 105840, while the sum is 39.

The spelling of 72713531064 in words is "seventy-two billion, seven hundred thirteen million, five hundred thirty-one thousand, sixty-four".