129638385140 has 24 divisors (see below), whose sum is σ = 296989755552. Its totient is φ = 47141230880.

The previous prime is 129638385139. The next prime is 129638385187. The reversal of 129638385140 is 41583836921.

It is a happy number.

It is a super-3 number, since 3×129638385140³ (a number of 34 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 294632474 + ... + 294632913.

It is an arithmetic number, because the mean of its divisors is an integer number (12374573148).

Almost surely, 2^129638385140 is an apocalyptic number.

129638385140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129638385140 is an abundant number, since it is smaller than the sum of its proper divisors (167351370412).

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

129638385140 is a wasteful number, since it uses less digits than its factorization.

129638385140 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 589265407 (or 589265405 counting only the distinct ones).

The product of its (nonzero) digits is 1244160, while the sum is 50.

The spelling of 129638385140 in words is "one hundred twenty-nine billion, six hundred thirty-eight million, three hundred eighty-five thousand, one hundred forty".