129356602369 has 4 divisors (see below), whose sum is σ = 134980802496. Its totient is φ = 123732402244.

The previous prime is 129356602327. The next prime is 129356602399. The reversal of 129356602369 is 963206653921.

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-129356602369 is a prime.

It is a super-2 number, since 2×129356602369² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (129356602399) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2812100029 + ... + 2812100074.

It is an arithmetic number, because the mean of its divisors is an integer number (33745200624).

Almost surely, 2^129356602369 is an apocalyptic number.

It is an amenable number.

129356602369 is a deficient number, since it is larger than the sum of its proper divisors (5624200127).

129356602369 is an equidigital number, since it uses as much as digits as its factorization.

129356602369 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5624200126.

The product of its (nonzero) digits is 3149280, while the sum is 52.

The spelling of 129356602369 in words is "one hundred twenty-nine billion, three hundred fifty-six million, six hundred two thousand, three hundred sixty-nine".