129671626538 has 32 divisors (see below), whose sum is σ = 203961079296. Its totient is φ = 61712627328.

The previous prime is 129671626507. The next prime is 129671626541. The reversal of 129671626538 is 835626176921.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 25538456 + ... + 25543532.

It is an arithmetic number, because the mean of its divisors is an integer number (6373783728).

Almost surely, 2^129671626538 is an apocalyptic number.

129671626538 is a deficient number, since it is larger than the sum of its proper divisors (74289452758).

129671626538 is a wasteful number, since it uses less digits than its factorization.

129671626538 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7718.

The product of its digits is 6531840, while the sum is 56.

The spelling of 129671626538 in words is "one hundred twenty-nine billion, six hundred seventy-one million, six hundred twenty-six thousand, five hundred thirty-eight".