129924897626 has 4 divisors (see below), whose sum is σ = 194887346442. Its totient is φ = 64962448812.

The previous prime is 129924897623. The next prime is 129924897649. The reversal of 129924897626 is 626798429921.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 109694102401 + 20230795225 = 331201^2 + 142235^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (129924897623) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 32481224405 + ... + 32481224408.

Almost surely, 2^129924897626 is an apocalyptic number.

129924897626 is a deficient number, since it is larger than the sum of its proper divisors (64962448816).

129924897626 is an equidigital number, since it uses as much as digits as its factorization.

129924897626 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 64962448815.

The product of its digits is 47029248, while the sum is 65.

The spelling of 129924897626 in words is "one hundred twenty-nine billion, nine hundred twenty-four million, eight hundred ninety-seven thousand, six hundred twenty-six".