85669632379 has 2 divisors, whose sum is σ = 85669632380. Its totient is φ = 85669632378.

The previous prime is 85669632341. The next prime is 85669632469. The reversal of 85669632379 is 97323696658.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85669632379 - 2¹⁵ = 85669599611 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 85669632379.

It is not a weakly prime, because it can be changed into another prime (85669632679) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42834816189 + 42834816190.

It is an arithmetic number, because the mean of its divisors is an integer number (42834816190).

Almost surely, 2^85669632379 is an apocalyptic number.

85669632379 is a deficient number, since it is larger than the sum of its proper divisors (1).

85669632379 is an equidigital number, since it uses as much as digits as its factorization.

85669632379 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 88179840, while the sum is 64.

The spelling of 85669632379 in words is "eighty-five billion, six hundred sixty-nine million, six hundred thirty-two thousand, three hundred seventy-nine".