129909827637 has 6 divisors (see below), whose sum is σ = 187647528822. Its totient is φ = 86606551752.

The previous prime is 129909827623. The next prime is 129909827647. The reversal of 129909827637 is 736728909921.

It can be written as a sum of positive squares in only one way, i.e., 109102053636 + 20807774001 = 330306^2 + 144249^2 .

It is not a de Polignac number, because 129909827637 - 2⁸ = 129909827381 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129909827647) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 7217212638 + ... + 7217212655.

It is an arithmetic number, because the mean of its divisors is an integer number (31274588137).

Almost surely, 2^129909827637 is an apocalyptic number.

It is an amenable number.

129909827637 is a deficient number, since it is larger than the sum of its proper divisors (57737701185).

129909827637 is a wasteful number, since it uses less digits than its factorization.

129909827637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14434425299 (or 14434425296 counting only the distinct ones).

The product of its (nonzero) digits is 20575296, while the sum is 63.

The spelling of 129909827637 in words is "one hundred twenty-nine billion, nine hundred nine million, eight hundred twenty-seven thousand, six hundred thirty-seven".