635812650013 has 4 divisors (see below), whose sum is σ = 640819048960. Its totient is φ = 630806251068.

The previous prime is 635812650001. The next prime is 635812650019. The reversal of 635812650013 is 310056218536.

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 a de Polignac number, because none of the positive numbers 2^k-635812650013 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (635812650019) 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, 2503199283 + ... + 2503199536.

It is an arithmetic number, because the mean of its divisors is an integer number (160204762240).

Almost surely, 2^635812650013 is an apocalyptic number.

It is an amenable number.

635812650013 is a deficient number, since it is larger than the sum of its proper divisors (5006398947).

635812650013 is a wasteful number, since it uses less digits than its factorization.

635812650013 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5006398946.

The product of its (nonzero) digits is 129600, while the sum is 40.

Adding to 635812650013 its reverse (310056218536), we get a palindrome (945868868549).

The spelling of 635812650013 in words is "six hundred thirty-five billion, eight hundred twelve million, six hundred fifty thousand, thirteen".