256723831411 has 2 divisors, whose sum is σ = 256723831412. Its totient is φ = 256723831410.

The previous prime is 256723831393. The next prime is 256723831439. The reversal of 256723831411 is 114138327652.

It is a happy number.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 256723831411 - 2⁹ = 256723830899 is a prime.

It is a super-2 number, since 2×256723831411² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (256723831811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 128361915705 + 128361915706.

It is an arithmetic number, because the mean of its divisors is an integer number (128361915706).

Almost surely, 2^256723831411 is an apocalyptic number.

256723831411 is a deficient number, since it is larger than the sum of its proper divisors (1).

256723831411 is an equidigital number, since it uses as much as digits as its factorization.

256723831411 is an evil number, because the sum of its binary digits is even.

The product of its digits is 241920, while the sum is 43.

The spelling of 256723831411 in words is "two hundred fifty-six billion, seven hundred twenty-three million, eight hundred thirty-one thousand, four hundred eleven".