85622668489 has 2 divisors, whose sum is σ = 85622668490. Its totient is φ = 85622668488.

The previous prime is 85622668487. The next prime is 85622668543. The reversal of 85622668489 is 98486622658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 76613811264 + 9008857225 = 276792^2 + 94915^2 .

It is a cyclic number.

It is not a de Polignac number, because 85622668489 - 2¹ = 85622668487 is a prime.

Together with 85622668487, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 85622668489.

It is not a weakly prime, because it can be changed into another prime (85622668487) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42811334244 + 42811334245.

It is an arithmetic number, because the mean of its divisors is an integer number (42811334245).

Almost surely, 2^85622668489 is an apocalyptic number.

It is an amenable number.

85622668489 is a deficient number, since it is larger than the sum of its proper divisors (1).

85622668489 is an equidigital number, since it uses as much as digits as its factorization.

85622668489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 79626240, while the sum is 64.

The spelling of 85622668489 in words is "eighty-five billion, six hundred twenty-two million, six hundred sixty-eight thousand, four hundred eighty-nine".