72472153717 has 4 divisors (see below), whose sum is σ = 73464923020. Its totient is φ = 71479384416.

The previous prime is 72472153711. The next prime is 72472153769. The reversal of 72472153717 is 71735127427.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 71735127427 = 6379 ⋅11245513.

It can be written as a sum of positive squares in 2 ways, for example, as 15427130436 + 57045023281 = 124206^2 + 238841^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72472153717 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 (72472153711) 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, 496384542 + ... + 496384687.

It is an arithmetic number, because the mean of its divisors is an integer number (18366230755).

Almost surely, 2^72472153717 is an apocalyptic number.

It is an amenable number.

72472153717 is a deficient number, since it is larger than the sum of its proper divisors (992769303).

72472153717 is an equidigital number, since it uses as much as digits as its factorization.

72472153717 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 992769302.

The product of its digits is 576240, while the sum is 46.

The spelling of 72472153717 in words is "seventy-two billion, four hundred seventy-two million, one hundred fifty-three thousand, seven hundred seventeen".