856307943259 has 2 divisors, whose sum is σ = 856307943260. Its totient is φ = 856307943258.

The previous prime is 856307943229. The next prime is 856307943263. The reversal of 856307943259 is 952349703658.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 856307943259 - 2¹⁷ = 856307812187 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 856307943197 and 856307943206.

It is not a weakly prime, because it can be changed into another prime (856307943229) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428153971629 + 428153971630.

It is an arithmetic number, because the mean of its divisors is an integer number (428153971630).

Almost surely, 2^856307943259 is an apocalyptic number.

856307943259 is a deficient number, since it is larger than the sum of its proper divisors (1).

856307943259 is an equidigital number, since it uses as much as digits as its factorization.

856307943259 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 48988800, while the sum is 61.

The spelling of 856307943259 in words is "eight hundred fifty-six billion, three hundred seven million, nine hundred forty-three thousand, two hundred fifty-nine".