635664241 has 4 divisors (see below), whose sum is σ = 638464752. Its totient is φ = 632863732.

The previous prime is 635664223. The next prime is 635664283. The reversal of 635664241 is 142466536.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 635664241 - 2¹¹ = 635662193 is a prime.

It is a super-2 number, since 2×635664241² = 808138054572212162, which contains 22 as substring.

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 635664241.

It is not an unprimeable number, because it can be changed into a prime (635661241) 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, 1399915 + ... + 1400368.

It is an arithmetic number, because the mean of its divisors is an integer number (159616188).

Almost surely, 2^635664241 is an apocalyptic number.

It is an amenable number.

635664241 is a deficient number, since it is larger than the sum of its proper divisors (2800511).

635664241 is a wasteful number, since it uses less digits than its factorization.

635664241 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2800510.

The product of its digits is 103680, while the sum is 37.

The square root of 635664241 is about 25212.3826918441. The cubic root of 635664241 is about 859.8234002803.

The spelling of 635664241 in words is "six hundred thirty-five million, six hundred sixty-four thousand, two hundred forty-one".