636318076680 has 1152 divisors, whose sum is σ = 2525799276000. Its totient is φ = 138773606400.

The previous prime is 636318076663. The next prime is 636318076687. The reversal of 636318076680 is 86670813636.

It can be written as a sum of positive squares in 16 ways, for example, as 363978129636 + 272339947044 = 603306^2 + 521862^2 .

It is not an unprimeable number, because it can be changed into a prime (636318076687) by changing a digit.

It is a polite number, since it can be written in 287 ways as a sum of consecutive naturals, for example, 5837780466 + ... + 5837780574.

Almost surely, 2^636318076680 is an apocalyptic number.

636318076680 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 636318076680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1262899638000).

636318076680 is an abundant number, since it is smaller than the sum of its proper divisors (1889481199320).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

636318076680 is a wasteful number, since it uses less digits than its factorization.

636318076680 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 248 (or 204 counting only the distinct ones).

The product of its (nonzero) digits is 5225472, while the sum is 54.

The spelling of 636318076680 in words is "six hundred thirty-six billion, three hundred eighteen million, seventy-six thousand, six hundred eighty".