635583134240 has 24 divisors (see below), whose sum is σ = 1501565155020. Its totient is φ = 254233253632.

The previous prime is 635583134227. The next prime is 635583134243. The reversal of 635583134240 is 42431385536.

It can be written as a sum of positive squares in 2 ways, for example, as 607196275984 + 28386858256 = 779228^2 + 168484^2 .

It is a junction number, because it is equal to n+sod(n) for n = 635583134191 and 635583134200.

It is not an unprimeable number, because it can be changed into a prime (635583134243) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1986197135 + ... + 1986197454.

Almost surely, 2^635583134240 is an apocalyptic number.

It is an amenable number.

635583134240 is an abundant number, since it is smaller than the sum of its proper divisors (865982020780).

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

635583134240 is a wasteful number, since it uses less digits than its factorization.

635583134240 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3972394604 (or 3972394596 counting only the distinct ones).

The product of its (nonzero) digits is 1036800, while the sum is 44.

The spelling of 635583134240 in words is "six hundred thirty-five billion, five hundred eighty-three million, one hundred thirty-four thousand, two hundred forty".