129783319938 has 24 divisors (see below), whose sum is σ = 281447635248. Its totient is φ = 43222577112.

The previous prime is 129783319927. The next prime is 129783320003. The reversal of 129783319938 is 839913387921.

129783319938 is a `hidden beast` number, since 1 + 297 + 8 + 331 + 9 + 9 + 3 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3190020 + ... + 3230447.

It is an arithmetic number, because the mean of its divisors is an integer number (11726984802).

Almost surely, 2^129783319938 is an apocalyptic number.

129783319938 is a gapful number since it is divisible by the number (18) formed by its first and last digit.

129783319938 is an abundant number, since it is smaller than the sum of its proper divisors (151664315310).

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

129783319938 is a wasteful number, since it uses less digits than its factorization.

129783319938 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6421598 (or 6421595 counting only the distinct ones).

The product of its digits is 17635968, while the sum is 63.

The spelling of 129783319938 in words is "one hundred twenty-nine billion, seven hundred eighty-three million, three hundred nineteen thousand, nine hundred thirty-eight".