29685688842239 has 4 divisors (see below), whose sum is σ = 29685755600424. Its totient is φ = 29685622084056.

The previous prime is 29685688842181. The next prime is 29685688842241. The reversal of 29685688842239 is 93224888658692.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-29685688842239 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (29685688842269) 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, 32707577 + ... + 33602930.

It is an arithmetic number, because the mean of its divisors is an integer number (7421438900106).

Almost surely, 2^{29685688842239} is an apocalyptic number.

29685688842239 is a deficient number, since it is larger than the sum of its proper divisors (66758185).

29685688842239 is an equidigital number, since it uses as much as digits as its factorization.

29685688842239 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 66758184.

The product of its digits is 5733089280, while the sum is 80.

The spelling of 29685688842239 in words is "twenty-nine trillion, six hundred eighty-five billion, six hundred eighty-eight million, eight hundred forty-two thousand, two hundred thirty-nine".