129558073640164 has 81 divisors (see below), whose sum is σ = 251375691357819. Its totient is φ = 58399691837760.

The previous prime is 129558073640153. The next prime is 129558073640173. The reversal of 129558073640164 is 461046370855921.

The square root of 129558073640164 is 11382358.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 10778417302500 + 118779656337664 = 3283050^2 + 10898608^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 12725471154 + ... + 12725481334.

It is a 2-persistent number, because it is pandigital, and so is 2⋅129558073640164 = 259116147280328, but 3⋅129558073640164 = 388674220920492 is not.

Almost surely, 2^{129558073640164} is an apocalyptic number.

129558073640164 is the 11382358-th square number.

It is an amenable number.

129558073640164 is a deficient number, since it is larger than the sum of its proper divisors (121817617717655).

129558073640164 is an frugal number, since it uses more digits than its factorization.

129558073640164 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 20478 (or 10239 counting only the distinct ones).

The product of its (nonzero) digits is 43545600, while the sum is 61.

The spelling of 129558073640164 in words is "one hundred twenty-nine trillion, five hundred fifty-eight billion, seventy-three million, six hundred forty thousand, one hundred sixty-four".