129104779420 has 24 divisors (see below), whose sum is σ = 271140940224. Its totient is φ = 51637930176.

The previous prime is 129104779409. The next prime is 129104779477. The reversal of 129104779420 is 24977401921.

It is a happy number.

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, 24354 + ... + 508726.

It is an arithmetic number, because the mean of its divisors is an integer number (11297539176).

Almost surely, 2^129104779420 is an apocalyptic number.

129104779420 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

129104779420 is an abundant number, since it is smaller than the sum of its proper divisors (142036160804).

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

129104779420 is a wasteful number, since it uses less digits than its factorization.

129104779420 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 497709 (or 497707 counting only the distinct ones).

The product of its (nonzero) digits is 254016, while the sum is 46.

The spelling of 129104779420 in words is "one hundred twenty-nine billion, one hundred four million, seven hundred seventy-nine thousand, four hundred twenty".