69644380691 has 2 divisors, whose sum is σ = 69644380692. Its totient is φ = 69644380690.

The previous prime is 69644380679. The next prime is 69644380693. The reversal of 69644380691 is 19608344696.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 69644380691 - 2¹⁸ = 69644118547 is a prime.

Together with 69644380693, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (69644380693) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 34822190345 + 34822190346.

It is an arithmetic number, because the mean of its divisors is an integer number (34822190346).

Almost surely, 2^69644380691 is an apocalyptic number.

69644380691 is a deficient number, since it is larger than the sum of its proper divisors (1).

69644380691 is an equidigital number, since it uses as much as digits as its factorization.

69644380691 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 6718464, while the sum is 56.

The spelling of 69644380691 in words is "sixty-nine billion, six hundred forty-four million, three hundred eighty thousand, six hundred ninety-one".