635640056267 has 2 divisors, whose sum is σ = 635640056268. Its totient is φ = 635640056266.

The previous prime is 635640056237. The next prime is 635640056281. The reversal of 635640056267 is 762650046536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 635640056267 - 2¹⁴ = 635640039883 is a prime.

It is a super-2 number, since 2×635640056267² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (635640056237) 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, 317820028133 + 317820028134.

It is an arithmetic number, because the mean of its divisors is an integer number (317820028134).

Almost surely, 2^635640056267 is an apocalyptic number.

635640056267 is a deficient number, since it is larger than the sum of its proper divisors (1).

635640056267 is an equidigital number, since it uses as much as digits as its factorization.

635640056267 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 5443200, while the sum is 50.

The spelling of 635640056267 in words is "six hundred thirty-five billion, six hundred forty million, fifty-six thousand, two hundred sixty-seven".