635020664 has 16 divisors (see below), whose sum is σ = 1195866600. Its totient is φ = 316122912.

The previous prime is 635020657. The next prime is 635020667. The reversal of 635020664 is 466020536.

It is a self number, because there is not a number n which added to its sum of digits gives 635020664.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635020667) 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, 171482 + ... + 175145.

Almost surely, 2^635020664 is an apocalyptic number.

It is an amenable number.

635020664 is a deficient number, since it is larger than the sum of its proper divisors (560845936).

635020664 is a wasteful number, since it uses less digits than its factorization.

635020664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 346862 (or 346858 counting only the distinct ones).

The product of its (nonzero) digits is 25920, while the sum is 32.

The square root of 635020664 is about 25199.6163462859. The cubic root of 635020664 is about 859.5331267972.

The spelling of 635020664 in words is "six hundred thirty-five million, twenty thousand, six hundred sixty-four".