636747242747636 has 24 divisors (see below), whose sum is σ = 1115376314325000. Its totient is φ = 318068299275264.

The previous prime is 636747242747617. The next prime is 636747242747639.

636747242747636 is nontrivially palindromic in base 10.

636747242747636 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 4 ways, for example, as 82637299336036 + 554109943411600 = 9090506^2 + 23539540^2 .

It is a super-2 number, since 2×636747242747636² (a number of 30 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (74) coincides with the sum of the digits of its prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636747242747639) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1017003050 + ... + 1017628958.

It is an arithmetic number, because the mean of its divisors is an integer number (46474013096875).

Almost surely, 2^{636747242747636} is an apocalyptic number.

It is an amenable number.

636747242747636 is a deficient number, since it is larger than the sum of its proper divisors (478629071577364).

636747242747636 is a wasteful number, since it uses less digits than its factorization.

636747242747636 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 869411 (or 869409 counting only the distinct ones).

The product of its digits is 7169347584, while the sum is 74.

The spelling of 636747242747636 in words is "six hundred thirty-six trillion, seven hundred forty-seven billion, two hundred forty-two million, seven hundred forty-seven thousand, six hundred thirty-six".