635745949687 has 2 divisors, whose sum is σ = 635745949688. Its totient is φ = 635745949686.

The previous prime is 635745949633. The next prime is 635745949733. The reversal of 635745949687 is 786949547536.

It is a happy number.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 635745949687 - 2²⁷ = 635611731959 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (635745949387) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 317872974843 + 317872974844.

It is an arithmetic number, because the mean of its divisors is an integer number (317872974844).

Almost surely, 2^635745949687 is an apocalyptic number.

635745949687 is a deficient number, since it is larger than the sum of its proper divisors (1).

635745949687 is an equidigital number, since it uses as much as digits as its factorization.

635745949687 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 1371686400, while the sum is 73.

The spelling of 635745949687 in words is "six hundred thirty-five billion, seven hundred forty-five million, nine hundred forty-nine thousand, six hundred eighty-seven".