635531261113 has 12 divisors (see below), whose sum is σ = 763139580672. Its totient is φ = 527168786760.

The previous prime is 635531261111. The next prime is 635531261129. The reversal of 635531261113 is 311162135536.

It is not a de Polignac number, because 635531261113 - 2¹ = 635531261111 is a prime.

It is not an unprimeable number, because it can be changed into a prime (635531261111) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 209192445 + ... + 209195482.

It is an arithmetic number, because the mean of its divisors is an integer number (63594965056).

Almost surely, 2^635531261113 is an apocalyptic number.

It is an amenable number.

635531261113 is a deficient number, since it is larger than the sum of its proper divisors (127608319559).

635531261113 is a wasteful number, since it uses less digits than its factorization.

635531261113 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 418387972 (or 418387965 counting only the distinct ones).

The product of its digits is 48600, while the sum is 37.

Adding to 635531261113 its reverse (311162135536), we get a palindrome (946693396649).

The spelling of 635531261113 in words is "six hundred thirty-five billion, five hundred thirty-one million, two hundred sixty-one thousand, one hundred thirteen".