72630512531 has 4 divisors (see below), whose sum is σ = 72773205600. Its totient is φ = 72487819464.

The previous prime is 72630512527. The next prime is 72630512569. The reversal of 72630512531 is 13521503627.

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

It is a cyclic number.

It is not a de Polignac number, because 72630512531 - 2² = 72630512527 is a prime.

It is a super-2 number, since 2×72630512531² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 72630512491 and 72630512500.

It is not an unprimeable number, because it can be changed into a prime (72630512831) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 71345771 + ... + 71346788.

It is an arithmetic number, because the mean of its divisors is an integer number (18193301400).

Almost surely, 2^72630512531 is an apocalyptic number.

72630512531 is a deficient number, since it is larger than the sum of its proper divisors (142693069).

72630512531 is a wasteful number, since it uses less digits than its factorization.

72630512531 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 142693068.

The product of its (nonzero) digits is 37800, while the sum is 35.

The spelling of 72630512531 in words is "seventy-two billion, six hundred thirty million, five hundred twelve thousand, five hundred thirty-one".