6364811818 has 4 divisors (see below), whose sum is σ = 9547217730. Its totient is φ = 3182405908.

The previous prime is 6364811777. The next prime is 6364811851. The reversal of 6364811818 is 8181184636.

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., 5309016769 + 1055795049 = 72863^2 + 32493^2 .

It is an unprimeable number.

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 as a sum of consecutive naturals, namely, 1591202953 + ... + 1591202956.

Almost surely, 2^6364811818 is an apocalyptic number.

6364811818 is a deficient number, since it is larger than the sum of its proper divisors (3182405912).

6364811818 is a wasteful number, since it uses less digits than its factorization.

6364811818 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3182405911.

The product of its digits is 221184, while the sum is 46.

The square root of 6364811818 is about 79779.7707316836. The cubic root of 6364811818 is about 1853.2265891442.

It can be divided in two parts, 63648 and 11818, that added together give a triangular number (75466 = T₃₈₈).

The spelling of 6364811818 in words is "six billion, three hundred sixty-four million, eight hundred eleven thousand, eight hundred eighteen".