129591729698 has 8 divisors (see below), whose sum is σ = 195110225820. Its totient is φ = 64554987760.

The previous prime is 129591729689. The next prime is 129591729737. The reversal of 129591729698 is 896927195921.

It can be written as a sum of positive squares in 2 ways, for example, as 89686473529 + 39905256169 = 299477^2 + 199763^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×129591729698² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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, 120437873 + ... + 120438948.

Almost surely, 2^129591729698 is an apocalyptic number.

129591729698 is a deficient number, since it is larger than the sum of its proper divisors (65518496122).

129591729698 is a wasteful number, since it uses less digits than its factorization.

129591729698 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 240877092.

The product of its digits is 44089920, while the sum is 68.

The spelling of 129591729698 in words is "one hundred twenty-nine billion, five hundred ninety-one million, seven hundred twenty-nine thousand, six hundred ninety-eight".