129718254899 has 8 divisors (see below), whose sum is σ = 131281592832. Its totient is φ = 128160762120.

The previous prime is 129718254893. The next prime is 129718254901. The reversal of 129718254899 is 998452817921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 129718254899 - 2⁸ = 129718254643 is a prime.

It is a super-3 number, since 3×129718254899³ (a number of 34 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129718254893) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1416629 + ... + 1505414.

It is an arithmetic number, because the mean of its divisors is an integer number (16410199104).

Almost surely, 2^129718254899 is an apocalyptic number.

129718254899 is a deficient number, since it is larger than the sum of its proper divisors (1563337933).

129718254899 is a wasteful number, since it uses less digits than its factorization.

129718254899 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2922577.

The product of its digits is 26127360, while the sum is 65.

The spelling of 129718254899 in words is "one hundred twenty-nine billion, seven hundred eighteen million, two hundred fifty-four thousand, eight hundred ninety-nine".