129645968031 has 48 divisors (see below), whose sum is σ = 195514156032. Its totient is φ = 82693094400.

The previous prime is 129645968003. The next prime is 129645968077. The reversal of 129645968031 is 130869546921.

129645968031 is a `hidden beast` number, since 12 + 9 + 6 + 4 + 596 + 8 + 0 + 31 = 666.

It is not a de Polignac number, because 129645968031 - 2¹⁴ = 129645951647 is a prime.

It is a super-2 number, since 2×129645968031² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129645968731) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 8769676 + ... + 8784446.

It is an arithmetic number, because the mean of its divisors is an integer number (4073211584).

Almost surely, 2^129645968031 is an apocalyptic number.

129645968031 is a deficient number, since it is larger than the sum of its proper divisors (65868188001).

129645968031 is a wasteful number, since it uses less digits than its factorization.

129645968031 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15164 (or 15161 counting only the distinct ones).

The product of its (nonzero) digits is 2799360, while the sum is 54.

The spelling of 129645968031 in words is "one hundred twenty-nine billion, six hundred forty-five million, nine hundred sixty-eight thousand, thirty-one".