129542183979 has 8 divisors (see below), whose sum is σ = 186009289872. Its totient is φ = 79718267040.

The previous prime is 129542183951. The next prime is 129542183989. The reversal of 129542183979 is 979381245921.

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

It is not a de Polignac number, because 129542183979 - 2¹¹ = 129542181931 is a prime.

It is not an unprimeable number, because it can be changed into a prime (129542183989) 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, 1660797192 + ... + 1660797269.

It is an arithmetic number, because the mean of its divisors is an integer number (23251161234).

Almost surely, 2^129542183979 is an apocalyptic number.

129542183979 is a deficient number, since it is larger than the sum of its proper divisors (56467105893).

129542183979 is a wasteful number, since it uses less digits than its factorization.

129542183979 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3321594477.

The product of its digits is 9797760, while the sum is 60.

The spelling of 129542183979 in words is "one hundred twenty-nine billion, five hundred forty-two million, one hundred eighty-three thousand, nine hundred seventy-nine".