72356332631 has 4 divisors (see below), whose sum is σ = 78934181064. Its totient is φ = 65778484200.

The previous prime is 72356332567. The next prime is 72356332649. The reversal of 72356332631 is 13623365327.

It is a semiprime because it is the product of two primes.

It is not a de Polignac number, because 72356332631 - 2⁶ = 72356332567 is a prime.

It is a super-2 number, since 2×72356332631² (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 (72356302631) 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, 3288924200 + ... + 3288924221.

It is an arithmetic number, because the mean of its divisors is an integer number (19733545266).

Almost surely, 2^72356332631 is an apocalyptic number.

72356332631 is a deficient number, since it is larger than the sum of its proper divisors (6577848433).

72356332631 is a wasteful number, since it uses less digits than its factorization.

72356332631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6577848432.

The product of its digits is 408240, while the sum is 41.

Adding to 72356332631 its reverse (13623365327), we get a palindrome (85979697958).

The spelling of 72356332631 in words is "seventy-two billion, three hundred fifty-six million, three hundred thirty-two thousand, six hundred thirty-one".