129499812849 has 64 divisors (see below), whose sum is σ = 194795274240. Its totient is φ = 75850629120.

The previous prime is 129499812821. The next prime is 129499812919. The reversal of 129499812849 is 948218994921.

It is not a de Polignac number, because 129499812849 - 2⁷ = 129499812721 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 129499812849.

It is not an unprimeable number, because it can be changed into a prime (129499812049) by changing a digit.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 101250192 + ... + 101251470.

It is an arithmetic number, because the mean of its divisors is an integer number (3043676160).

Almost surely, 2^129499812849 is an apocalyptic number.

It is an amenable number.

129499812849 is a deficient number, since it is larger than the sum of its proper divisors (65295461391).

129499812849 is a wasteful number, since it uses less digits than its factorization.

129499812849 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2110.

The product of its digits is 26873856, while the sum is 66.

The spelling of 129499812849 in words is "one hundred twenty-nine billion, four hundred ninety-nine million, eight hundred twelve thousand, eight hundred forty-nine".