129955365015 has 32 divisors (see below), whose sum is σ = 237646742016. Its totient is φ = 59404648320.

The previous prime is 129955364999. The next prime is 129955365037. The reversal of 129955365015 is 510563559921.

It is a happy number.

It is not a de Polignac number, because 129955365015 - 2⁴ = 129955364999 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2745489 + ... + 2792421.

It is an arithmetic number, because the mean of its divisors is an integer number (7426460688).

Almost surely, 2^129955365015 is an apocalyptic number.

129955365015 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

129955365015 is a deficient number, since it is larger than the sum of its proper divisors (107691377001).

129955365015 is a wasteful number, since it uses less digits than its factorization.

129955365015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 73319.

The product of its (nonzero) digits is 1822500, while the sum is 51.

The spelling of 129955365015 in words is "one hundred twenty-nine billion, nine hundred fifty-five million, three hundred sixty-five thousand, fifteen".