3636349978 has 4 divisors (see below), whose sum is σ = 5454524970. Its totient is φ = 1818174988.

The previous prime is 3636349967. The next prime is 3636349993. The reversal of 3636349978 is 8799436363.

3636349978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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., 2580944809 + 1055405169 = 50803^2 + 32487^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 909087493 + ... + 909087496.

Almost surely, 2^3636349978 is an apocalyptic number.

3636349978 is a deficient number, since it is larger than the sum of its proper divisors (1818174992).

3636349978 is a wasteful number, since it uses less digits than its factorization.

3636349978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1818174991.

The product of its digits is 17635968, while the sum is 58.

The square root of 3636349978 is about 60302.1556662778. The cubic root of 3636349978 is about 1537.7599943513.

The spelling of 3636349978 in words is "three billion, six hundred thirty-six million, three hundred forty-nine thousand, nine hundred seventy-eight".