129629629631 has 4 divisors (see below), whose sum is σ = 130021260264. Its totient is φ = 129237999000.

The previous prime is 129629629621. The next prime is 129629629637. The reversal of 129629629631 is 136926926921.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129629629631 is a prime.

It is a super-2 number, since 2×129629629631² (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 (129629629637) 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, 195814820 + ... + 195815481.

It is an arithmetic number, because the mean of its divisors is an integer number (32505315066).

Almost surely, 2^129629629631 is an apocalyptic number.

129629629631 is a deficient number, since it is larger than the sum of its proper divisors (391630633).

129629629631 is an equidigital number, since it uses as much as digits as its factorization.

129629629631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 391630632.

The product of its digits is 3779136, while the sum is 56.

The spelling of 129629629631 in words is "one hundred twenty-nine billion, six hundred twenty-nine million, six hundred twenty-nine thousand, six hundred thirty-one".