636043501660342 has 4 divisors (see below), whose sum is σ = 954065252490516. Its totient is φ = 318021750830170.

The previous prime is 636043501660327. The next prime is 636043501660361. The reversal of 636043501660342 is 243066105340636.

It is a semiprime because it is the product of two primes.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159010875415084 + ... + 159010875415087.

It is an arithmetic number, because the mean of its divisors is an integer number (238516313122629).

Almost surely, 2^{636043501660342} is an apocalyptic number.

636043501660342 is a deficient number, since it is larger than the sum of its proper divisors (318021750830174).

636043501660342 is a wasteful number, since it uses less digits than its factorization.

636043501660342 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318021750830173.

The product of its (nonzero) digits is 5598720, while the sum is 49.

The spelling of 636043501660342 in words is "six hundred thirty-six trillion, forty-three billion, five hundred one million, six hundred sixty thousand, three hundred forty-two".