636340866045 has 32 divisors (see below), whose sum is σ = 1059987044352. Its totient is φ = 325685878272.

The previous prime is 636340866043. The next prime is 636340866233. The reversal of 636340866045 is 540668043636.

It is not a de Polignac number, because 636340866045 - 2¹ = 636340866043 is a prime.

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 31 ways as a sum of consecutive naturals, for example, 7812637 + ... + 7893666.

It is an arithmetic number, because the mean of its divisors is an integer number (33124595136).

Almost surely, 2^636340866045 is an apocalyptic number.

It is an amenable number.

636340866045 is a deficient number, since it is larger than the sum of its proper divisors (423646178307).

636340866045 is a wasteful number, since it uses less digits than its factorization.

636340866045 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15706421.

The product of its (nonzero) digits is 7464960, while the sum is 51.

The spelling of 636340866045 in words is "six hundred thirty-six billion, three hundred forty million, eight hundred sixty-six thousand, forty-five".