72472044431 has 4 divisors (see below), whose sum is σ = 72589503792. Its totient is φ = 72354585072.

The previous prime is 72472044427. The next prime is 72472044433. The reversal of 72472044431 is 13444027427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 13444027427 = 4093 ⋅3284639.

It is a cyclic number.

It is not a de Polignac number, because 72472044431 - 2² = 72472044427 is a prime.

It is a super-2 number, since 2×72472044431² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72472044433) 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, 58728755 + ... + 58729988.

It is an arithmetic number, because the mean of its divisors is an integer number (18147375948).

Almost surely, 2^72472044431 is an apocalyptic number.

72472044431 is a deficient number, since it is larger than the sum of its proper divisors (117459361).

72472044431 is a wasteful number, since it uses less digits than its factorization.

72472044431 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 117459360.

The product of its (nonzero) digits is 150528, while the sum is 38.

The spelling of 72472044431 in words is "seventy-two billion, four hundred seventy-two million, forty-four thousand, four hundred thirty-one".