129739890560 has 128 divisors (see below), whose sum is σ = 365902755840. Its totient is φ = 43047290880.

The previous prime is 129739890557. The next prime is 129739890571. The reversal of 129739890560 is 65098937921.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×129739890560² (a number of 23 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 129739890560.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 328214 + ... + 605973.

It is an arithmetic number, because the mean of its divisors is an integer number (2858615280).

Almost surely, 2^129739890560 is an apocalyptic number.

129739890560 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129739890560 is an abundant number, since it is smaller than the sum of its proper divisors (236162865280).

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

129739890560 is an equidigital number, since it uses as much as digits as its factorization.

129739890560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 934244 (or 934232 counting only the distinct ones).

The product of its (nonzero) digits is 7348320, while the sum is 59.

The spelling of 129739890560 in words is "one hundred twenty-nine billion, seven hundred thirty-nine million, eight hundred ninety thousand, five hundred sixty".