633255802561 has 2 divisors, whose sum is σ = 633255802562. Its totient is φ = 633255802560.

The previous prime is 633255802519. The next prime is 633255802577. The reversal of 633255802561 is 165208552336.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 549355204225 + 83900598336 = 741185^2 + 289656^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-633255802561 is a prime.

It is a super-2 number, since 2×633255802561² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (633255802961) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 316627901280 + 316627901281.

It is an arithmetic number, because the mean of its divisors is an integer number (316627901281).

Almost surely, 2^633255802561 is an apocalyptic number.

It is an amenable number.

633255802561 is a deficient number, since it is larger than the sum of its proper divisors (1).

633255802561 is an equidigital number, since it uses as much as digits as its factorization.

633255802561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1296000, while the sum is 46.

The spelling of 633255802561 in words is "six hundred thirty-three billion, two hundred fifty-five million, eight hundred two thousand, five hundred sixty-one".