129972652776 has 48 divisors (see below), whose sum is σ = 360195538560. Its totient is φ = 42316676640.

The previous prime is 129972652739. The next prime is 129972652783. The reversal of 129972652776 is 677256279921.

129972652776 is a `hidden beast` number, since 1 + 299 + 72 + 6 + 5 + 277 + 6 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 20987320 + ... + 20993511.

It is an arithmetic number, because the mean of its divisors is an integer number (7504073720).

Almost surely, 2^129972652776 is an apocalyptic number.

It is an amenable number.

129972652776 is an abundant number, since it is smaller than the sum of its proper divisors (230222885784).

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

129972652776 is a wasteful number, since it uses less digits than its factorization.

129972652776 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 41980886 (or 41980879 counting only the distinct ones).

The product of its digits is 40007520, while the sum is 63.

The spelling of 129972652776 in words is "one hundred twenty-nine billion, nine hundred seventy-two million, six hundred fifty-two thousand, seven hundred seventy-six".