72701565652 has 6 divisors (see below), whose sum is σ = 127227739898. Its totient is φ = 36350782824.

The previous prime is 72701565647. The next prime is 72701565661. The reversal of 72701565652 is 25656510727.

It can be written as a sum of positive squares in only one way, i.e., 49669253956 + 23032311696 = 222866^2 + 151764^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 9087695703 + ... + 9087695710.

Almost surely, 2^72701565652 is an apocalyptic number.

It is an amenable number.

72701565652 is a deficient number, since it is larger than the sum of its proper divisors (54526174246).

72701565652 is a wasteful number, since it uses less digits than its factorization.

72701565652 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18175391417 (or 18175391415 counting only the distinct ones).

The product of its (nonzero) digits is 882000, while the sum is 46.

The spelling of 72701565652 in words is "seventy-two billion, seven hundred one million, five hundred sixty-five thousand, six hundred fifty-two".