85644341687 has 2 divisors, whose sum is σ = 85644341688. Its totient is φ = 85644341686.

The previous prime is 85644341639. The next prime is 85644341707. The reversal of 85644341687 is 78614344658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 85644341687 - 2²⁴ = 85627564471 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85644341617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42822170843 + 42822170844.

It is an arithmetic number, because the mean of its divisors is an integer number (42822170844).

Almost surely, 2^85644341687 is an apocalyptic number.

85644341687 is a deficient number, since it is larger than the sum of its proper divisors (1).

85644341687 is an equidigital number, since it uses as much as digits as its factorization.

85644341687 is an evil number, because the sum of its binary digits is even.

The product of its digits is 15482880, while the sum is 56.

The spelling of 85644341687 in words is "eighty-five billion, six hundred forty-four million, three hundred forty-one thousand, six hundred eighty-seven".