1818935664 has 480 divisors, whose sum is σ = 6459586560. Its totient is φ = 435456000.

The previous prime is 1818935663. The next prime is 1818935669. The reversal of 1818935664 is 4665398181.

It is a super-2 number, since 2×1818935664² = 6617053899542241792, which contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1818935663) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 18009214 + ... + 18009314.

It is an arithmetic number, because the mean of its divisors is an integer number (13457472).

Almost surely, 2^1818935664 is an apocalyptic number.

1818935664 is a gapful number since it is divisible by the number (14) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 1818935664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3229793280).

1818935664 is an abundant number, since it is smaller than the sum of its proper divisors (4640650896).

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

1818935664 is a wasteful number, since it uses less digits than its factorization.

1818935664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 189 (or 176 counting only the distinct ones).

The product of its digits is 1244160, while the sum is 51.

The square root of 1818935664 is about 42648.9819808164. The cubic root of 1818935664 is about 1220.6911035487.

The spelling of 1818935664 in words is "one billion, eight hundred eighteen million, nine hundred thirty-five thousand, six hundred sixty-four".