129727798975 has 6 divisors (see below), whose sum is σ = 160862470760. Its totient is φ = 103782239160.

The previous prime is 129727798961. The next prime is 129727798987. The reversal of 129727798975 is 579897727921.

It is not a de Polignac number, because 129727798975 - 2⁹ = 129727798463 is a prime.

It is a super-2 number, since 2×129727798975² (a number of 23 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 129727798898 and 129727798907.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2594555955 + ... + 2594556004.

Almost surely, 2^129727798975 is an apocalyptic number.

129727798975 is a deficient number, since it is larger than the sum of its proper divisors (31134671785).

129727798975 is an equidigital number, since it uses as much as digits as its factorization.

129727798975 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5189111969 (or 5189111964 counting only the distinct ones).

The product of its digits is 280052640, while the sum is 73.

The spelling of 129727798975 in words is "one hundred twenty-nine billion, seven hundred twenty-seven million, seven hundred ninety-eight thousand, nine hundred seventy-five".