72712731253 has 4 divisors (see below), whose sum is σ = 72779380128. Its totient is φ = 72646082380.

The previous prime is 72712731233. The next prime is 72712731263. The reversal of 72712731253 is 35213721727.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 35213721727 = 79 ⋅445743313.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-72712731253 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 (72712731233) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 33322801 + ... + 33324982.

It is an arithmetic number, because the mean of its divisors is an integer number (18194845032).

Almost surely, 2^72712731253 is an apocalyptic number.

It is an amenable number.

72712731253 is a deficient number, since it is larger than the sum of its proper divisors (66648875).

72712731253 is a wasteful number, since it uses less digits than its factorization.

72712731253 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66648874.

The product of its digits is 123480, while the sum is 40.

The spelling of 72712731253 in words is "seventy-two billion, seven hundred twelve million, seven hundred thirty-one thousand, two hundred fifty-three".