636603336143394 has 32 divisors (see below), whose sum is σ = 1328564772641664. Its totient is φ = 202974779884800.

The previous prime is 636603336143351. The next prime is 636603336143399. The reversal of 636603336143394 is 493341633306636.

It is not an unprimeable number, because it can be changed into a prime (636603336143399) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 220969732 + ... + 223832144.

It is an arithmetic number, because the mean of its divisors is an integer number (41517649145052).

Almost surely, 2^{636603336143394} is an apocalyptic number.

636603336143394 is an abundant number, since it is smaller than the sum of its proper divisors (691961436498270).

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

636603336143394 is a wasteful number, since it uses less digits than its factorization.

636603336143394 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4474042.

The product of its (nonzero) digits is 136048896, while the sum is 60.

The spelling of 636603336143394 in words is "six hundred thirty-six trillion, six hundred three billion, three hundred thirty-six million, one hundred forty-three thousand, three hundred ninety-four".