72730868794 has 4 divisors (see below), whose sum is σ = 109096303194. Its totient is φ = 36365434396.

The previous prime is 72730868761. The next prime is 72730868827. The reversal of 72730868794 is 49786803727.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 49786803727 = 21499 ⋅2315773.

It is an interprime number because it is at equal distance from previous prime (72730868761) and next prime (72730868827).

It can be written as a sum of positive squares in only one way, i.e., 61709018569 + 11021850225 = 248413^2 + 104985^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 18182717197 + ... + 18182717200.

Almost surely, 2^72730868794 is an apocalyptic number.

72730868794 is a deficient number, since it is larger than the sum of its proper divisors (36365434400).

72730868794 is a wasteful number, since it uses less digits than its factorization.

72730868794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 36365434399.

The product of its (nonzero) digits is 28449792, while the sum is 61.

The spelling of 72730868794 in words is "seventy-two billion, seven hundred thirty million, eight hundred sixty-eight thousand, seven hundred ninety-four".