72238536253 has 12 divisors (see below), whose sum is σ = 80385840444. Its totient is φ = 64530691200.

The previous prime is 72238536247. The next prime is 72238536263. The reversal of 72238536253 is 35263583227.

It can be written as a sum of positive squares in 2 ways, for example, as 21893049369 + 50345486884 = 147963^2 + 224378^2 .

It is not a de Polignac number, because 72238536253 - 2⁹ = 72238535741 is a prime.

It is a super-2 number, since 2×72238536253² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (72238536233) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 2878668 + ... + 2903653.

It is an arithmetic number, because the mean of its divisors is an integer number (6698820037).

Almost surely, 2^72238536253 is an apocalyptic number.

It is an amenable number.

72238536253 is a deficient number, since it is larger than the sum of its proper divisors (8147304191).

72238536253 is a wasteful number, since it uses less digits than its factorization.

72238536253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5782396 (or 5782365 counting only the distinct ones).

The product of its digits is 1814400, while the sum is 46.

The spelling of 72238536253 in words is "seventy-two billion, two hundred thirty-eight million, five hundred thirty-six thousand, two hundred fifty-three".