72397912583 has 4 divisors (see below), whose sum is σ = 72559155600. Its totient is φ = 72236669568.

The previous prime is 72397912579. The next prime is 72397912589. The reversal of 72397912583 is 38521979327.

It is a happy number.

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

It is a cyclic number.

It is not a de Polignac number, because 72397912583 - 2² = 72397912579 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 (72397912589) 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, 80620835 + ... + 80621732.

It is an arithmetic number, because the mean of its divisors is an integer number (18139788900).

Almost surely, 2^72397912583 is an apocalyptic number.

72397912583 is a deficient number, since it is larger than the sum of its proper divisors (161243017).

72397912583 is a wasteful number, since it uses less digits than its factorization.

72397912583 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 161243016.

The product of its digits is 5715360, while the sum is 56.

The spelling of 72397912583 in words is "seventy-two billion, three hundred ninety-seven million, nine hundred twelve thousand, five hundred eighty-three".