72704362613 has 4 divisors (see below), whose sum is σ = 72863453580. Its totient is φ = 72545271648.

The previous prime is 72704362579. The next prime is 72704362637. The reversal of 72704362613 is 31626340727.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 28216272529 + 44488090084 = 167977^2 + 210922^2 .

It is a cyclic number.

It is not a de Polignac number, because 72704362613 - 2¹⁴ = 72704346229 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72704362663) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 79544798 + ... + 79545711.

It is an arithmetic number, because the mean of its divisors is an integer number (18215863395).

Almost surely, 2^72704362613 is an apocalyptic number.

It is an amenable number.

72704362613 is a deficient number, since it is larger than the sum of its proper divisors (159090967).

72704362613 is a wasteful number, since it uses less digits than its factorization.

72704362613 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159090966.

The product of its (nonzero) digits is 254016, while the sum is 41.

The spelling of 72704362613 in words is "seventy-two billion, seven hundred four million, three hundred sixty-two thousand, six hundred thirteen".