72979662499 has 4 divisors (see below), whose sum is σ = 72980686960. Its totient is φ = 72978638040.

The previous prime is 72979662467. The next prime is 72979662521. The reversal of 72979662499 is 99426697927.

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 72979662499 - 2⁵ = 72979662467 is a prime.

It is a super-2 number, since 2×72979662499² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (72979662299) 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, 396687 + ... + 550744.

It is an arithmetic number, because the mean of its divisors is an integer number (18245171740).

Almost surely, 2^72979662499 is an apocalyptic number.

72979662499 is a deficient number, since it is larger than the sum of its proper divisors (1024461).

72979662499 is an equidigital number, since it uses as much as digits as its factorization.

72979662499 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1024460.

The product of its digits is 185177664, while the sum is 70.

The spelling of 72979662499 in words is "seventy-two billion, nine hundred seventy-nine million, six hundred sixty-two thousand, four hundred ninety-nine".