129217339742 has 64 divisors (see below), whose sum is σ = 215568138240. Its totient is φ = 57849292800.

The previous prime is 129217339709. The next prime is 129217339763. The reversal of 129217339742 is 247933712921.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 13918142 + ... + 13927422.

It is an arithmetic number, because the mean of its divisors is an integer number (3368252160).

Almost surely, 2^129217339742 is an apocalyptic number.

129217339742 is a deficient number, since it is larger than the sum of its proper divisors (86350798498).

129217339742 is a wasteful number, since it uses less digits than its factorization.

129217339742 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9609.

The product of its digits is 1143072, while the sum is 50.

The spelling of 129217339742 in words is "one hundred twenty-nine billion, two hundred seventeen million, three hundred thirty-nine thousand, seven hundred forty-two".