635640056867 has 2 divisors, whose sum is σ = 635640056868. Its totient is φ = 635640056866.

The previous prime is 635640056803. The next prime is 635640056893. The reversal of 635640056867 is 768650046536.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 635640056867 - 2⁶ = 635640056803 is a prime.

It is not a weakly prime, because it can be changed into another prime (635640056267) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317820028433 + 317820028434.

It is an arithmetic number, because the mean of its divisors is an integer number (317820028434).

Almost surely, 2^635640056867 is an apocalyptic number.

635640056867 is a deficient number, since it is larger than the sum of its proper divisors (1).

635640056867 is an equidigital number, since it uses as much as digits as its factorization.

635640056867 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 21772800, while the sum is 56.

The spelling of 635640056867 in words is "six hundred thirty-five billion, six hundred forty million, fifty-six thousand, eight hundred sixty-seven".