635704432636 has 48 divisors (see below), whose sum is σ = 1370713236480. Its totient is φ = 251211280320.

The previous prime is 635704432633. The next prime is 635704432663. The reversal of 635704432636 is 636234407536.

It is a self number, because there is not a number n which added to its sum of digits gives 635704432636.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635704432633) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 626926 + ... + 1290133.

It is an arithmetic number, because the mean of its divisors is an integer number (28556525760).

Almost surely, 2^635704432636 is an apocalyptic number.

It is an amenable number.

635704432636 is an abundant number, since it is smaller than the sum of its proper divisors (735008803844).

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

635704432636 is a wasteful number, since it uses less digits than its factorization.

635704432636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1917994 (or 1917992 counting only the distinct ones).

The product of its (nonzero) digits is 6531840, while the sum is 49.

The spelling of 635704432636 in words is "six hundred thirty-five billion, seven hundred four million, four hundred thirty-two thousand, six hundred thirty-six".