631903287193 has 16 divisors (see below), whose sum is σ = 666235350720. Its totient is φ = 597679382016.

The previous prime is 631903287157. The next prime is 631903287203. The reversal of 631903287193 is 391782309136.

It is a cyclic number.

It is not a de Polignac number, because 631903287193 - 2¹⁷ = 631903156121 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 631903287193.

It is not an unprimeable number, because it can be changed into a prime (631903287593) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 34648005 + ... + 34666237.

It is an arithmetic number, because the mean of its divisors is an integer number (41639709420).

Almost surely, 2^631903287193 is an apocalyptic number.

It is an amenable number.

631903287193 is a deficient number, since it is larger than the sum of its proper divisors (34332063527).

631903287193 is a wasteful number, since it uses less digits than its factorization.

631903287193 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 21096.

The product of its (nonzero) digits is 1469664, while the sum is 52.

The spelling of 631903287193 in words is "six hundred thirty-one billion, nine hundred three million, two hundred eighty-seven thousand, one hundred ninety-three".