129617295730 has 16 divisors (see below), whose sum is σ = 251258142744. Its totient is φ = 47858693760.

The previous prime is 129617295713. The next prime is 129617295749. The reversal of 129617295730 is 37592716921.

It can be written as a sum of positive squares in 4 ways, for example, as 101153894209 + 28463401521 = 318047^2 + 168711^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 498527931 + ... + 498528190.

Almost surely, 2^129617295730 is an apocalyptic number.

129617295730 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129617295730 is a deficient number, since it is larger than the sum of its proper divisors (121640847014).

129617295730 is a wasteful number, since it uses less digits than its factorization.

129617295730 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 997056141.

The product of its (nonzero) digits is 1428840, while the sum is 52.

The spelling of 129617295730 in words is "one hundred twenty-nine billion, six hundred seventeen million, two hundred ninety-five thousand, seven hundred thirty".