129377122840 has 128 divisors (see below), whose sum is σ = 340219653120. Its totient is φ = 43362086400.

The previous prime is 129377122801. The next prime is 129377122933. The reversal of 129377122840 is 48221773921.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 2760805 + ... + 2807275.

It is an arithmetic number, because the mean of its divisors is an integer number (2657966040).

Almost surely, 2^129377122840 is an apocalyptic number.

129377122840 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 129377122840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (170109826560).

129377122840 is an abundant number, since it is smaller than the sum of its proper divisors (210842530280).

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

129377122840 is a wasteful number, since it uses less digits than its factorization.

129377122840 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 46713 (or 46709 counting only the distinct ones).

The product of its (nonzero) digits is 338688, while the sum is 46.

The spelling of 129377122840 in words is "one hundred twenty-nine billion, three hundred seventy-seven million, one hundred twenty-two thousand, eight hundred forty".