72623353231 has 64 divisors (see below), whose sum is σ = 94024949760. Its totient is φ = 55042416000.

The previous prime is 72623353207. The next prime is 72623353273. The reversal of 72623353231 is 13235332627.

It is not a de Polignac number, because 72623353231 - 2⁵ = 72623353199 is a prime.

It is a super-2 number, since 2×72623353231² (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 (72623353291) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20682766 + ... + 20686276.

It is an arithmetic number, because the mean of its divisors is an integer number (1469139840).

Almost surely, 2^72623353231 is an apocalyptic number.

72623353231 is a deficient number, since it is larger than the sum of its proper divisors (21401596529).

72623353231 is a wasteful number, since it uses less digits than its factorization.

72623353231 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3908.

The product of its digits is 136080, while the sum is 37.

Adding to 72623353231 its reverse (13235332627), we get a palindrome (85858685858).

The spelling of 72623353231 in words is "seventy-two billion, six hundred twenty-three million, three hundred fifty-three thousand, two hundred thirty-one".