129139916738 has 8 divisors (see below), whose sum is σ = 221382714432. Its totient is φ = 55345678596.

The previous prime is 129139916693. The next prime is 129139916761. The reversal of 129139916738 is 837619931921.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4612139870 + ... + 4612139897.

It is an arithmetic number, because the mean of its divisors is an integer number (27672839304).

Almost surely, 2^129139916738 is an apocalyptic number.

129139916738 is a deficient number, since it is larger than the sum of its proper divisors (92242797694).

129139916738 is an equidigital number, since it uses as much as digits as its factorization.

129139916738 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9224279776.

The product of its digits is 4408992, while the sum is 59.

The spelling of 129139916738 in words is "one hundred twenty-nine billion, one hundred thirty-nine million, nine hundred sixteen thousand, seven hundred thirty-eight".