402256475891 has 2 divisors, whose sum is σ = 402256475892. Its totient is φ = 402256475890.

The previous prime is 402256475879. The next prime is 402256475893. The reversal of 402256475891 is 198574652204.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 402256475891 - 2⁶ = 402256475827 is a prime.

It is a Sophie Germain prime.

Together with 402256475893, it forms a pair of twin primes.

It is a Chen prime.

It is not a weakly prime, because it can be changed into another prime (402256475893) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 201128237945 + 201128237946.

It is an arithmetic number, because the mean of its divisors is an integer number (201128237946).

Almost surely, 2^402256475891 is an apocalyptic number.

402256475891 is a deficient number, since it is larger than the sum of its proper divisors (1).

402256475891 is an equidigital number, since it uses as much as digits as its factorization.

402256475891 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4838400, while the sum is 53.

The spelling of 402256475891 in words is "four hundred two billion, two hundred fifty-six million, four hundred seventy-five thousand, eight hundred ninety-one".