129809325957 has 16 divisors (see below), whose sum is σ = 180670972032. Its totient is φ = 82820301120.

The previous prime is 129809325949. The next prime is 129809325973. The reversal of 129809325957 is 759523908921.

It is not a de Polignac number, because 129809325957 - 2³ = 129809325949 is a prime.

It is a super-2 number, since 2×129809325957² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129809325957.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129809325157) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9578913 + ... + 9592454.

It is an arithmetic number, because the mean of its divisors is an integer number (11291935752).

Almost surely, 2^129809325957 is an apocalyptic number.

It is an amenable number.

129809325957 is a deficient number, since it is larger than the sum of its proper divisors (50861646075).

129809325957 is a wasteful number, since it uses less digits than its factorization.

129809325957 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 19171468.

The product of its (nonzero) digits is 12247200, while the sum is 60.

The spelling of 129809325957 in words is "one hundred twenty-nine billion, eight hundred nine million, three hundred twenty-five thousand, nine hundred fifty-seven".