129891429995 has 4 divisors (see below), whose sum is σ = 155869716000. Its totient is φ = 103913143992.

The previous prime is 129891429991. The next prime is 129891430021. The reversal of 129891429995 is 599924198921.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 599924198921 = 52733 ⋅11376637.

It is a cyclic number.

It is not a de Polignac number, because 129891429995 - 2² = 129891429991 is a prime.

It is a super-2 number, since 2×129891429995² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129891429991) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 12989142995 + ... + 12989143004.

It is an arithmetic number, because the mean of its divisors is an integer number (38967429000).

Almost surely, 2^129891429995 is an apocalyptic number.

129891429995 is a deficient number, since it is larger than the sum of its proper divisors (25978286005).

129891429995 is an equidigital number, since it uses as much as digits as its factorization.

129891429995 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25978286004.

The product of its digits is 37791360, while the sum is 68.

The spelling of 129891429995 in words is "one hundred twenty-nine billion, eight hundred ninety-one million, four hundred twenty-nine thousand, nine hundred ninety-five".