129634829640 has 96 divisors (see below), whose sum is σ = 431111229120. Its totient is φ = 33765346944.

The previous prime is 129634829627. The next prime is 129634829647. The reversal of 129634829640 is 46928436921.

129634829640 is a `hidden beast` number, since 1 + 2 + 9 + 6 + 348 + 296 + 4 + 0 = 666.

It is a super-5 number, since 5×129634829640⁵ (a number of 57 digits) contains 55555 as substring.

It is not an unprimeable number, because it can be changed into a prime (129634829647) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4171692 + ... + 4202651.

It is an arithmetic number, because the mean of its divisors is an integer number (4490741970).

Almost surely, 2^129634829640 is an apocalyptic number.

129634829640 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129634829640 is an abundant number, since it is smaller than the sum of its proper divisors (301476399480).

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

129634829640 is a wasteful number, since it uses less digits than its factorization.

129634829640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8374403 (or 8374396 counting only the distinct ones).

The product of its (nonzero) digits is 4478976, while the sum is 54.

The spelling of 129634829640 in words is "one hundred twenty-nine billion, six hundred thirty-four million, eight hundred twenty-nine thousand, six hundred forty".