85856791859 has 2 divisors, whose sum is σ = 85856791860. Its totient is φ = 85856791858.

The previous prime is 85856791847. The next prime is 85856791877. The reversal of 85856791859 is 95819765858.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 85856791859 - 2¹² = 85856787763 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 85856791792 and 85856791801.

It is not a weakly prime, because it can be changed into another prime (85856791829) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 42928395929 + 42928395930.

It is an arithmetic number, because the mean of its divisors is an integer number (42928395930).

Almost surely, 2^85856791859 is an apocalyptic number.

85856791859 is a deficient number, since it is larger than the sum of its proper divisors (1).

85856791859 is an equidigital number, since it uses as much as digits as its factorization.

85856791859 is an evil number, because the sum of its binary digits is even.

The product of its digits is 217728000, while the sum is 71.

The spelling of 85856791859 in words is "eighty-five billion, eight hundred fifty-six million, seven hundred ninety-one thousand, eight hundred fifty-nine".