635772868744 has 64 divisors (see below), whose sum is σ = 1295976931200. Its totient is φ = 290656763904.

The previous prime is 635772868691. The next prime is 635772868751. The reversal of 635772868744 is 447868277536.

It is a self number, because there is not a number n which added to its sum of digits gives 635772868744.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 4717869 + ... + 4850755.

It is an arithmetic number, because the mean of its divisors is an integer number (20249639550).

Almost surely, 2^635772868744 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 635772868744, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (647988465600).

635772868744 is an abundant number, since it is smaller than the sum of its proper divisors (660204062456).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

635772868744 is a wasteful number, since it uses less digits than its factorization.

635772868744 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 133342 (or 133338 counting only the distinct ones).

The product of its digits is 379330560, while the sum is 67.

The spelling of 635772868744 in words is "six hundred thirty-five billion, seven hundred seventy-two million, eight hundred sixty-eight thousand, seven hundred forty-four".