636074042 has 4 divisors (see below), whose sum is σ = 954111066. Its totient is φ = 318037020.

The previous prime is 636074009. The next prime is 636074053. The reversal of 636074042 is 240470636.

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

It can be written as a sum of positive squares in only one way, i.e., 630461881 + 5612161 = 25109^2 + 2369^2 .

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 159018509 + ... + 159018512.

Almost surely, 2^636074042 is an apocalyptic number.

636074042 is a deficient number, since it is larger than the sum of its proper divisors (318037024).

636074042 is a wasteful number, since it uses less digits than its factorization.

636074042 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 318037023.

The product of its (nonzero) digits is 24192, while the sum is 32.

The square root of 636074042 is about 25220.5083612524. The cubic root of 636074042 is about 860.0081313455.

The spelling of 636074042 in words is "six hundred thirty-six million, seventy-four thousand, forty-two".