255863695597 has 2 divisors, whose sum is σ = 255863695598. Its totient is φ = 255863695596.

The previous prime is 255863695561. The next prime is 255863695609. The reversal of 255863695597 is 795596368552.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 129000215556 + 126863480041 = 359166^2 + 356179^2 .

It is a cyclic number.

It is not a de Polignac number, because 255863695597 - 2³¹ = 253716211949 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (255863695097) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 127931847798 + 127931847799.

It is an arithmetic number, because the mean of its divisors is an integer number (127931847799).

Almost surely, 2^255863695597 is an apocalyptic number.

It is an amenable number.

255863695597 is a deficient number, since it is larger than the sum of its proper divisors (1).

255863695597 is an equidigital number, since it uses as much as digits as its factorization.

255863695597 is an evil number, because the sum of its binary digits is even.

The product of its digits is 612360000, while the sum is 70.

The spelling of 255863695597 in words is "two hundred fifty-five billion, eight hundred sixty-three million, six hundred ninety-five thousand, five hundred ninety-seven".