85795549639 has 2 divisors, whose sum is σ = 85795549640. Its totient is φ = 85795549638.

The previous prime is 85795549547. The next prime is 85795549657. The reversal of 85795549639 is 93694559758.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85795549639 is a prime.

It is a super-2 number, since 2×85795549639² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85795549339) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42897774819 + 42897774820.

It is an arithmetic number, because the mean of its divisors is an integer number (42897774820).

Almost surely, 2^85795549639 is an apocalyptic number.

85795549639 is a deficient number, since it is larger than the sum of its proper divisors (1).

85795549639 is an equidigital number, since it uses as much as digits as its factorization.

85795549639 is an evil number, because the sum of its binary digits is even.

The product of its digits is 367416000, while the sum is 70.

The spelling of 85795549639 in words is "eighty-five billion, seven hundred ninety-five million, five hundred forty-nine thousand, six hundred thirty-nine".