856597145497 has 2 divisors, whose sum is σ = 856597145498. Its totient is φ = 856597145496.

The previous prime is 856597145483. The next prime is 856597145513. The reversal of 856597145497 is 794541795658.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 763842788361 + 92754357136 = 873981^2 + 304556^2 .

It is a cyclic number.

It is not a de Polignac number, because 856597145497 - 2³⁵ = 822237407129 is a prime.

It is not a weakly prime, because it can be changed into another prime (856597143497) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 428298572748 + 428298572749.

It is an arithmetic number, because the mean of its divisors is an integer number (428298572749).

Almost surely, 2^856597145497 is an apocalyptic number.

It is an amenable number.

856597145497 is a deficient number, since it is larger than the sum of its proper divisors (1).

856597145497 is an equidigital number, since it uses as much as digits as its factorization.

856597145497 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 381024000, while the sum is 70.

The spelling of 856597145497 in words is "eight hundred fifty-six billion, five hundred ninety-seven million, one hundred forty-five thousand, four hundred ninety-seven".