129699636369 has 16 divisors (see below), whose sum is σ = 182759834880. Its totient is φ = 81589194000.

The previous prime is 129699636317. The next prime is 129699636373. The reversal of 129699636369 is 963636996921.

It is a de Polignac number, because none of the positive numbers 2^k-129699636369 is a prime.

It is a super-2 number, since 2×129699636369² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129699637369) 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, 4518427 + ... + 4547040.

It is an arithmetic number, because the mean of its divisors is an integer number (11422489680).

Almost surely, 2^129699636369 is an apocalyptic number.

129699636369 is a gapful number since it is divisible by the number (19) formed by its first and last digit.

It is an amenable number.

129699636369 is a deficient number, since it is larger than the sum of its proper divisors (53060198511).

129699636369 is a wasteful number, since it uses less digits than its factorization.

129699636369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9065740.

The product of its digits is 153055008, while the sum is 69.

The spelling of 129699636369 in words is "one hundred twenty-nine billion, six hundred ninety-nine million, six hundred thirty-six thousand, three hundred sixty-nine".