129637812050 has 96 divisors (see below), whose sum is σ = 265375014912. Its totient is φ = 46912711680.

The previous prime is 129637812043. The next prime is 129637812061. The reversal of 129637812050 is 50218736921.

It is a super-2 number, since 2×129637812050² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129637811992 and 129637812010.

It is an unprimeable number.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 2585519 + ... + 2635181.

It is an arithmetic number, because the mean of its divisors is an integer number (2764323072).

Almost surely, 2^129637812050 is an apocalyptic number.

129637812050 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

129637812050 is an abundant number, since it is smaller than the sum of its proper divisors (135737202862).

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

129637812050 is a wasteful number, since it uses less digits than its factorization.

129637812050 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 49812 (or 49807 counting only the distinct ones).

The product of its (nonzero) digits is 181440, while the sum is 44.

The spelling of 129637812050 in words is "one hundred twenty-nine billion, six hundred thirty-seven million, eight hundred twelve thousand, fifty".