129269669761 has 4 divisors (see below), whose sum is σ = 129416068912. Its totient is φ = 129123270612.

The previous prime is 129269669759. The next prime is 129269669773. The reversal of 129269669761 is 167966962921.

It is a happy number.

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, and also an emirpimes, since its reverse is a distinct semiprime: 167966962921 = 11933 ⋅14075837.

It is a cyclic number.

It is not a de Polignac number, because 129269669761 - 2¹ = 129269669759 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 129269669693 and 129269669702.

It is not an unprimeable number, because it can be changed into a prime (129269669741) 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, 73198251 + ... + 73200016.

It is an arithmetic number, because the mean of its divisors is an integer number (32354017228).

Almost surely, 2^129269669761 is an apocalyptic number.

It is an amenable number.

129269669761 is a deficient number, since it is larger than the sum of its proper divisors (146399151).

129269669761 is an equidigital number, since it uses as much as digits as its factorization.

129269669761 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 146399150.

The product of its digits is 26453952, while the sum is 64.

The spelling of 129269669761 in words is "one hundred twenty-nine billion, two hundred sixty-nine million, six hundred sixty-nine thousand, seven hundred sixty-one".