129627915940 has 24 divisors (see below), whose sum is σ = 272324283840. Its totient is φ = 51831040608.

The previous prime is 129627915917. The next prime is 129627915941. The reversal of 129627915940 is 49519726921.

It is a happy number.

129627915940 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not an unprimeable number, because it can be changed into a prime (129627915941) 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, 1204992 + ... + 1308151.

It is an arithmetic number, because the mean of its divisors is an integer number (11346845160).

Almost surely, 2^129627915940 is an apocalyptic number.

129627915940 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129627915940 is an abundant number, since it is smaller than the sum of its proper divisors (142696367900).

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

129627915940 is a wasteful number, since it uses less digits than its factorization.

129627915940 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2515731 (or 2515729 counting only the distinct ones).

The product of its (nonzero) digits is 2449440, while the sum is 55.

The spelling of 129627915940 in words is "one hundred twenty-nine billion, six hundred twenty-seven million, nine hundred fifteen thousand, nine hundred forty".