636340866044 has 24 divisors (see below), whose sum is σ = 1200524254608. Its totient is φ = 293385628800.

The previous prime is 636340866043. The next prime is 636340866233. The reversal of 636340866044 is 440668043636.

It is a super-3 number, since 3×636340866044³ (a number of 36 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 636340865983 and 636340866001.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (636340866043) 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, 6411857 + ... + 6510344.

It is an arithmetic number, because the mean of its divisors is an integer number (50021843942).

Almost surely, 2^636340866044 is an apocalyptic number.

It is an amenable number.

636340866044 is a deficient number, since it is larger than the sum of its proper divisors (564183388564).

636340866044 is a wasteful number, since it uses less digits than its factorization.

636340866044 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12923165 (or 12923163 counting only the distinct ones).

The product of its (nonzero) digits is 5971968, while the sum is 50.

The spelling of 636340866044 in words is "six hundred thirty-six billion, three hundred forty million, eight hundred sixty-six thousand, forty-four".