1817316864 has 640 divisors, whose sum is σ = 6717427200. Its totient is φ = 477757440.

The previous prime is 1817316857. The next prime is 1817316877. The reversal of 1817316864 is 4686137181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 49116654 + ... + 49116690.

It is an arithmetic number, because the mean of its divisors is an integer number (10495980).

Almost surely, 2^1817316864 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1817316864, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3358713600).

1817316864 is an abundant number, since it is smaller than the sum of its proper divisors (4900110336).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

1817316864 is a wasteful number, since it uses less digits than its factorization.

1817316864 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 111 (or 89 counting only the distinct ones).

The product of its digits is 193536, while the sum is 45.

The square root of 1817316864 is about 42629.9995777621. Note that the first 3 decimals coincide. The cubic root of 1817316864 is about 1220.3288695056.

The spelling of 1817316864 in words is "one billion, eight hundred seventeen million, three hundred sixteen thousand, eight hundred sixty-four".