129718983926 has 16 divisors (see below), whose sum is σ = 222506791584. Its totient is φ = 55561002624.

The previous prime is 129718983853. The next prime is 129718983941. The reversal of 129718983926 is 629389817921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2712755 + ... + 2760158.

It is an arithmetic number, because the mean of its divisors is an integer number (13906674474).

Almost surely, 2^129718983926 is an apocalyptic number.

129718983926 is a deficient number, since it is larger than the sum of its proper divisors (92787807658).

129718983926 is a wasteful number, since it uses less digits than its factorization.

129718983926 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5474615.

The product of its digits is 23514624, while the sum is 65.

The spelling of 129718983926 in words is "one hundred twenty-nine billion, seven hundred eighteen million, nine hundred eighty-three thousand, nine hundred twenty-six".