129522216637 has 4 divisors (see below), whose sum is σ = 141296963616. Its totient is φ = 117747469660.

The previous prime is 129522216563. The next prime is 129522216667. The reversal of 129522216637 is 736612225921.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-129522216637 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (129522216667) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5887373473 + ... + 5887373494.

It is an arithmetic number, because the mean of its divisors is an integer number (35324240904).

Almost surely, 2^129522216637 is an apocalyptic number.

It is an amenable number.

129522216637 is a deficient number, since it is larger than the sum of its proper divisors (11774746979).

129522216637 is a wasteful number, since it uses less digits than its factorization.

129522216637 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11774746978.

The product of its digits is 544320, while the sum is 46.

The spelling of 129522216637 in words is "one hundred twenty-nine billion, five hundred twenty-two million, two hundred sixteen thousand, six hundred thirty-seven".