129987926961 has 8 divisors (see below), whose sum is σ = 179293692480. Its totient is φ = 83670389712.

The previous prime is 129987926953. The next prime is 129987927007. The reversal of 129987926961 is 169629789921.

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

It is not a de Polignac number, because 129987926961 - 2³ = 129987926953 is a prime.

It is a super-2 number, since 2×129987926961² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (129987926921) 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, 747056965 + ... + 747057138.

It is an arithmetic number, because the mean of its divisors is an integer number (22411711560).

Almost surely, 2^129987926961 is an apocalyptic number.

It is an amenable number.

129987926961 is a deficient number, since it is larger than the sum of its proper divisors (49305765519).

129987926961 is a wasteful number, since it uses less digits than its factorization.

129987926961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1494114135.

The product of its digits is 52907904, while the sum is 69.

The spelling of 129987926961 in words is "one hundred twenty-nine billion, nine hundred eighty-seven million, nine hundred twenty-six thousand, nine hundred sixty-one".