72657016004 has 6 divisors (see below), whose sum is σ = 127149778014. Its totient is φ = 36328508000.

The previous prime is 72657016001. The next prime is 72657016007. The reversal of 72657016004 is 40061075627.

It is an interprime number because it is at equal distance from previous prime (72657016001) and next prime (72657016007).

It can be written as a sum of positive squares in only one way, i.e., 71421493504 + 1235522500 = 267248^2 + 35150^2 .

It is not an unprimeable number, because it can be changed into a prime (72657016001) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9082126997 + ... + 9082127004.

It is an arithmetic number, because the mean of its divisors is an integer number (21191629669).

Almost surely, 2^72657016004 is an apocalyptic number.

It is an amenable number.

72657016004 is a deficient number, since it is larger than the sum of its proper divisors (54492762010).

72657016004 is a wasteful number, since it uses less digits than its factorization.

72657016004 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18164254005 (or 18164254003 counting only the distinct ones).

The product of its (nonzero) digits is 70560, while the sum is 38.

The spelling of 72657016004 in words is "seventy-two billion, six hundred fifty-seven million, sixteen thousand, four".