129893895976 has 16 divisors (see below), whose sum is σ = 262285751700. Its totient is φ = 59951028864.

The previous prime is 129893895959. The next prime is 129893895977. The reversal of 129893895976 is 679598398921.

It can be written as a sum of positive squares in 2 ways, for example, as 128827873476 + 1066022500 = 358926^2 + 32650^2 .

It is not an unprimeable number, because it can be changed into a prime (129893895977) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 624489781 + ... + 624489988.

Almost surely, 2^129893895976 is an apocalyptic number.

It is an amenable number.

129893895976 is an abundant number, since it is smaller than the sum of its proper divisors (132391855724).

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

129893895976 is a wasteful number, since it uses less digits than its factorization.

129893895976 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1248979788 (or 1248979784 counting only the distinct ones).

The product of its digits is 529079040, while the sum is 76.

The spelling of 129893895976 in words is "one hundred twenty-nine billion, eight hundred ninety-three million, eight hundred ninety-five thousand, nine hundred seventy-six".