129992912806 has 8 divisors (see below), whose sum is σ = 195011713080. Its totient is φ = 64989008448.

The previous prime is 129992912783. The next prime is 129992912837. The reversal of 129992912806 is 608219299921.

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

It is a congruent number.

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, 3702136 + ... + 3737083.

It is an arithmetic number, because the mean of its divisors is an integer number (24376464135).

Almost surely, 2^129992912806 is an apocalyptic number.

129992912806 is a deficient number, since it is larger than the sum of its proper divisors (65018800274).

129992912806 is an equidigital number, since it uses as much as digits as its factorization.

129992912806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7447958.

The product of its (nonzero) digits is 2519424, while the sum is 58.

The spelling of 129992912806 in words is "one hundred twenty-nine billion, nine hundred ninety-two million, nine hundred twelve thousand, eight hundred six".