635372423311 has 4 divisors (see below), whose sum is σ = 635391961992. Its totient is φ = 635352884632.

The previous prime is 635372423269. The next prime is 635372423347. The reversal of 635372423311 is 113324273536.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 635372423311 - 2⁷ = 635372423183 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 (635372423381) 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, 9720481 + ... + 9785626.

It is an arithmetic number, because the mean of its divisors is an integer number (158847990498).

Almost surely, 2^635372423311 is an apocalyptic number.

635372423311 is a deficient number, since it is larger than the sum of its proper divisors (19538681).

635372423311 is a wasteful number, since it uses less digits than its factorization.

635372423311 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19538680.

The product of its digits is 272160, while the sum is 40.

Adding to 635372423311 its reverse (113324273536), we get a palindrome (748696696847).

The spelling of 635372423311 in words is "six hundred thirty-five billion, three hundred seventy-two million, four hundred twenty-three thousand, three hundred eleven".