129506929544 has 32 divisors (see below), whose sum is σ = 246185568000. Its totient is φ = 63857688192.

The previous prime is 129506929529. The next prime is 129506929547. The reversal of 129506929544 is 445929605921.

It is a self number, because there is not a number n which added to its sum of digits gives 129506929544.

It is not an unprimeable number, because it can be changed into a prime (129506929547) 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, 7138517 + ... + 7156635.

It is an arithmetic number, because the mean of its divisors is an integer number (7693299000).

Almost surely, 2^129506929544 is an apocalyptic number.

It is an amenable number.

129506929544 is a deficient number, since it is larger than the sum of its proper divisors (116678638456).

129506929544 is a wasteful number, since it uses less digits than its factorization.

129506929544 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30437 (or 30433 counting only the distinct ones).

The product of its (nonzero) digits is 6998400, while the sum is 56.

The spelling of 129506929544 in words is "one hundred twenty-nine billion, five hundred six million, nine hundred twenty-nine thousand, five hundred forty-four".