129157956592 has 40 divisors (see below), whose sum is σ = 286430747616. Its totient is φ = 55268610816.

The previous prime is 129157956539. The next prime is 129157956593. The reversal of 129157956592 is 295659751921.

It is a self number, because there is not a number n which added to its sum of digits gives 129157956592.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129157956593) 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, 809863 + ... + 956134.

Almost surely, 2^129157956592 is an apocalyptic number.

It is an amenable number.

129157956592 is an abundant number, since it is smaller than the sum of its proper divisors (157272791024).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129157956592 is a wasteful number, since it uses less digits than its factorization.

129157956592 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1766665 (or 1766659 counting only the distinct ones).

The product of its digits is 15309000, while the sum is 61.

The spelling of 129157956592 in words is "one hundred twenty-nine billion, one hundred fifty-seven million, nine hundred fifty-six thousand, five hundred ninety-two".