631485775 has 18 divisors (see below), whose sum is σ = 790159992. Its totient is φ = 500616000.

The previous prime is 631485763. The next prime is 631485797. The reversal of 631485775 is 577584136.

It is not a de Polignac number, because 631485775 - 2²⁷ = 497268047 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 17 ways as a sum of consecutive naturals, for example, 1543771 + ... + 1544179.

Almost surely, 2^631485775 is an apocalyptic number.

631485775 is a deficient number, since it is larger than the sum of its proper divisors (158674217).

631485775 is an equidigital number, since it uses as much as digits as its factorization.

631485775 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 979 (or 565 counting only the distinct ones).

The product of its digits is 705600, while the sum is 46.

The square root of 631485775 is about 25129.3807126240. The cubic root of 631485775 is about 857.9352735787.

The spelling of 631485775 in words is "six hundred thirty-one million, four hundred eighty-five thousand, seven hundred seventy-five".