72701565647 has 2 divisors, whose sum is σ = 72701565648. Its totient is φ = 72701565646.

The previous prime is 72701565637. The next prime is 72701565661. The reversal of 72701565647 is 74656510727.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 72701565647 - 2¹² = 72701561551 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 72701565595 and 72701565604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (72701565617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 36350782823 + 36350782824.

It is an arithmetic number, because the mean of its divisors is an integer number (36350782824).

Almost surely, 2^72701565647 is an apocalyptic number.

72701565647 is a deficient number, since it is larger than the sum of its proper divisors (1).

72701565647 is an equidigital number, since it uses as much as digits as its factorization.

72701565647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2469600, while the sum is 50.

The spelling of 72701565647 in words is "seventy-two billion, seven hundred one million, five hundred sixty-five thousand, six hundred forty-seven".