256723897583 has 2 divisors, whose sum is σ = 256723897584. Its totient is φ = 256723897582.

The previous prime is 256723897541. The next prime is 256723897607. The reversal of 256723897583 is 385798327652.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 256723897583 - 2²⁰ = 256722849007 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (256723897523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128361948791 + 128361948792.

It is an arithmetic number, because the mean of its divisors is an integer number (128361948792).

Almost surely, 2^256723897583 is an apocalyptic number.

256723897583 is a deficient number, since it is larger than the sum of its proper divisors (1).

256723897583 is an equidigital number, since it uses as much as digits as its factorization.

256723897583 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 152409600, while the sum is 65.

The spelling of 256723897583 in words is "two hundred fifty-six billion, seven hundred twenty-three million, eight hundred ninety-seven thousand, five hundred eighty-three".