85904436719 has 2 divisors, whose sum is σ = 85904436720. Its totient is φ = 85904436718.

The previous prime is 85904436713. The next prime is 85904436763. The reversal of 85904436719 is 91763440958.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-85904436719 is a prime.

It is a super-2 number, since 2×85904436719² (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 (85904436713) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42952218359 + 42952218360.

It is an arithmetic number, because the mean of its divisors is an integer number (42952218360).

Almost surely, 2^85904436719 is an apocalyptic number.

85904436719 is a deficient number, since it is larger than the sum of its proper divisors (1).

85904436719 is an equidigital number, since it uses as much as digits as its factorization.

85904436719 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6531840, while the sum is 56.

The spelling of 85904436719 in words is "eighty-five billion, nine hundred four million, four hundred thirty-six thousand, seven hundred nineteen".