636134354018 has 8 divisors (see below), whose sum is σ = 954560666412. Its totient is φ = 317947465216.

The previous prime is 636134354017. The next prime is 636134354027. The reversal of 636134354018 is 810453431636.

It can be written as a sum of positive squares in 2 ways, for example, as 535497577729 + 100636776289 = 731777^2 + 317233^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a self number, because there is not a number n which added to its sum of digits gives 636134354018.

It is not an unprimeable number, because it can be changed into a prime (636134354017) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 59849255 + ... + 59859882.

Almost surely, 2^636134354018 is an apocalyptic number.

636134354018 is a deficient number, since it is larger than the sum of its proper divisors (318426312394).

636134354018 is a wasteful number, since it uses less digits than its factorization.

636134354018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119711796.

The product of its (nonzero) digits is 622080, while the sum is 44.

The spelling of 636134354018 in words is "six hundred thirty-six billion, one hundred thirty-four million, three hundred fifty-four thousand, eighteen".