72317566737 has 48 divisors (see below), whose sum is σ = 118577659200. Its totient is φ = 42102840960.

The previous prime is 72317566709. The next prime is 72317566781. The reversal of 72317566737 is 73766571327.

72317566737 is a `hidden beast` number, since 7 + 2 + 3 + 1 + 7 + 566 + 73 + 7 = 666.

It is not a de Polignac number, because 72317566737 - 2¹⁹ = 72317042449 is a prime.

It is not an unprimeable number, because it can be changed into a prime (72317565737) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 1620787 + ... + 1664807.

It is an arithmetic number, because the mean of its divisors is an integer number (2470367900).

Almost surely, 2^72317566737 is an apocalyptic number.

It is an amenable number.

72317566737 is a deficient number, since it is larger than the sum of its proper divisors (46260092463).

72317566737 is a wasteful number, since it uses less digits than its factorization.

72317566737 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 44798 (or 44795 counting only the distinct ones).

The product of its digits is 7779240, while the sum is 54.

The spelling of 72317566737 in words is "seventy-two billion, three hundred seventeen million, five hundred sixty-six thousand, seven hundred thirty-seven".