129533079878 has 16 divisors (see below), whose sum is σ = 206220031920. Its totient is φ = 60811255296.

The previous prime is 129533079869. The next prime is 129533079959. The reversal of 129533079878 is 878970335921.

It is a self number, because there is not a number n which added to its sum of digits gives 129533079878.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4532051 + ... + 4560542.

It is an arithmetic number, because the mean of its divisors is an integer number (12888751995).

Almost surely, 2^129533079878 is an apocalyptic number.

129533079878 is a deficient number, since it is larger than the sum of its proper divisors (76686952042).

129533079878 is a wasteful number, since it uses less digits than its factorization.

129533079878 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9093031.

The product of its (nonzero) digits is 22861440, while the sum is 62.

The spelling of 129533079878 in words is "one hundred twenty-nine billion, five hundred thirty-three million, seventy-nine thousand, eight hundred seventy-eight".