12642640631 has 8 divisors (see below), whose sum is σ = 13574866464. Its totient is φ = 11731363840.

The previous prime is 12642640609. The next prime is 12642640687. The reversal of 12642640631 is 13604624621.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 12642640631 - 2³⁰ = 11568898807 is a prime.

It is a super-2 number, since 2×12642640631² (a number of 21 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 = 12642640591 and 12642640600.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12642646631) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 5236010 + ... + 5238423.

It is an arithmetic number, because the mean of its divisors is an integer number (1696858308).

Almost surely, 2^12642640631 is an apocalyptic number.

12642640631 is a deficient number, since it is larger than the sum of its proper divisors (932225833).

12642640631 is a wasteful number, since it uses less digits than its factorization.

12642640631 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10474521.

The product of its (nonzero) digits is 41472, while the sum is 35.

The spelling of 12642640631 in words is "twelve billion, six hundred forty-two million, six hundred forty thousand, six hundred thirty-one".