256304506633 has 12 divisors (see below), whose sum is σ = 298544041092. Its totient is φ = 219399334560.

The previous prime is 256304506571. The next prime is 256304506687. The reversal of 256304506633 is 336605403652.

It can be written as a sum of positive squares in 2 ways, for example, as 107707363344 + 148597143289 = 328188^2 + 385483^2 .

It is not a de Polignac number, because 256304506633 - 2⁹ = 256304506121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 256304506633.

It is not an unprimeable number, because it can be changed into a prime (256304504633) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 3417798 + ... + 3491983.

It is an arithmetic number, because the mean of its divisors is an integer number (24878670091).

Almost surely, 2^256304506633 is an apocalyptic number.

It is an amenable number.

256304506633 is a deficient number, since it is larger than the sum of its proper divisors (42239534459).

256304506633 is an equidigital number, since it uses as much as digits as its factorization.

256304506633 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6910552 (or 6910545 counting only the distinct ones).

The product of its (nonzero) digits is 1166400, while the sum is 43.

The spelling of 256304506633 in words is "two hundred fifty-six billion, three hundred four million, five hundred six thousand, six hundred thirty-three".