129099862956 has 24 divisors (see below), whose sum is σ = 306171261424. Its totient is φ = 42327823680.

The previous prime is 129099862949. The next prime is 129099862967. The reversal of 129099862956 is 659268990921.

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, 88182235 + ... + 88183698.

Almost surely, 2^129099862956 is an apocalyptic number.

It is an amenable number.

129099862956 is an abundant number, since it is smaller than the sum of its proper divisors (177071398468).

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

129099862956 is a wasteful number, since it uses less digits than its factorization.

129099862956 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 176366001 (or 176365999 counting only the distinct ones).

The product of its (nonzero) digits is 37791360, while the sum is 66.

The spelling of 129099862956 in words is "one hundred twenty-nine billion, ninety-nine million, eight hundred sixty-two thousand, nine hundred fifty-six".