72397451279 has 8 divisors (see below), whose sum is σ = 75559206912. Its totient is φ = 69236865720.

The previous prime is 72397451263. The next prime is 72397451299. The reversal of 72397451279 is 97215479327.

It is a happy number.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 72397451279 - 2⁴ = 72397451263 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 (72397451209) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 164879 + ... + 414704.

It is an arithmetic number, because the mean of its divisors is an integer number (9444900864).

Almost surely, 2^72397451279 is an apocalyptic number.

72397451279 is a deficient number, since it is larger than the sum of its proper divisors (3161755633).

72397451279 is a wasteful number, since it uses less digits than its factorization.

72397451279 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 585037.

The product of its digits is 6667920, while the sum is 56.

The spelling of 72397451279 in words is "seventy-two billion, three hundred ninety-seven million, four hundred fifty-one thousand, two hundred seventy-nine".