129468375638 has 16 divisors (see below), whose sum is σ = 222131855520. Its totient is φ = 55439929536.

The previous prime is 129468375637. The next prime is 129468375643. The reversal of 129468375638 is 836573864921.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129468375637) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3859133 + ... + 3892536.

It is an arithmetic number, because the mean of its divisors is an integer number (13883240970).

Almost surely, 2^129468375638 is an apocalyptic number.

129468375638 is a deficient number, since it is larger than the sum of its proper divisors (92663479882).

129468375638 is a wasteful number, since it uses less digits than its factorization.

129468375638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7752871.

The product of its digits is 52254720, while the sum is 62.

The spelling of 129468375638 in words is "one hundred twenty-nine billion, four hundred sixty-eight million, three hundred seventy-five thousand, six hundred thirty-eight".