85814500861 has 2 divisors, whose sum is σ = 85814500862. Its totient is φ = 85814500860.

The previous prime is 85814500841. The next prime is 85814500927. The reversal of 85814500861 is 16800541858.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 75850668100 + 9963832761 = 275410^2 + 99819^2 .

It is a cyclic number.

It is not a de Polignac number, because 85814500861 - 2⁹ = 85814500349 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (85814500831) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42907250430 + 42907250431.

It is an arithmetic number, because the mean of its divisors is an integer number (42907250431).

Almost surely, 2^85814500861 is an apocalyptic number.

It is an amenable number.

85814500861 is a deficient number, since it is larger than the sum of its proper divisors (1).

85814500861 is an equidigital number, since it uses as much as digits as its factorization.

85814500861 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 307200, while the sum is 46.

The spelling of 85814500861 in words is "eighty-five billion, eight hundred fourteen million, five hundred thousand, eight hundred sixty-one".