1813344664 has 16 divisors (see below), whose sum is σ = 3433032720. Its totient is φ = 897869280.

The previous prime is 1813344649. The next prime is 1813344691. The reversal of 1813344664 is 4664433181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1099507 + ... + 1101154.

It is an arithmetic number, because the mean of its divisors is an integer number (214564545).

Almost surely, 2^1813344664 is an apocalyptic number.

It is an amenable number.

1813344664 is a deficient number, since it is larger than the sum of its proper divisors (1619688056).

1813344664 is a wasteful number, since it uses less digits than its factorization.

1813344664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2200770 (or 2200766 counting only the distinct ones).

The product of its digits is 165888, while the sum is 40.

The square root of 1813344664 is about 42583.3848349330. The cubic root of 1813344664 is about 1219.4391097259.

The spelling of 1813344664 in words is "one billion, eight hundred thirteen million, three hundred forty-four thousand, six hundred sixty-four".