129013791665 has 32 divisors (see below), whose sum is σ = 177293905920. Its totient is φ = 89262417600.

The previous prime is 129013791653. The next prime is 129013791679. The reversal of 129013791665 is 566197310921.

It is not a de Polignac number, because 129013791665 - 2⁴ = 129013791649 is a prime.

It is a super-3 number, since 3×129013791665³ (a number of 34 digits) contains 333 as substring.

It is a Smith number, since the sum of its digits (50) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 540659 + ... + 741848.

It is an arithmetic number, because the mean of its divisors is an integer number (5540434560).

Almost surely, 2^129013791665 is an apocalyptic number.

It is an amenable number.

129013791665 is a deficient number, since it is larger than the sum of its proper divisors (48280114255).

129013791665 is a wasteful number, since it uses less digits than its factorization.

129013791665 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1282613.

The product of its (nonzero) digits is 612360, while the sum is 50.

The spelling of 129013791665 in words is "one hundred twenty-nine billion, thirteen million, seven hundred ninety-one thousand, six hundred sixty-five".