129168574656 has 56 divisors (see below), whose sum is σ = 372827482944. Its totient is φ = 39141991680.

The previous prime is 129168574537. The next prime is 129168574669. The reversal of 129168574656 is 656475861921.

It is a super-4 number, since 4×129168574656⁴ (a number of 46 digits) contains 4444 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129168574656.

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, 30577570 + ... + 30581793.

It is an arithmetic number, because the mean of its divisors is an integer number (6657633624).

Almost surely, 2^129168574656 is an apocalyptic number.

129168574656 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

129168574656 is an abundant number, since it is smaller than the sum of its proper divisors (243658908288).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

129168574656 is a wasteful number, since it uses less digits than its factorization.

129168574656 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 61159389 (or 61159379 counting only the distinct ones).

The product of its digits is 21772800, while the sum is 60.

The spelling of 129168574656 in words is "one hundred twenty-nine billion, one hundred sixty-eight million, five hundred seventy-four thousand, six hundred fifty-six".