1818694944 has 240 divisors, whose sum is σ = 5881540896. Its totient is φ = 546739200.

The previous prime is 1818694937. The next prime is 1818694957. The reversal of 1818694944 is 4494968181.

It is a happy number.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a nude number because it is divisible by every one of its digits.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 6472084 + ... + 6472364.

Almost surely, 2^1818694944 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 1818694944, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2940770448).

1818694944 is an abundant number, since it is smaller than the sum of its proper divisors (4062845952).

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

1818694944 is a wasteful number, since it uses less digits than its factorization.

1818694944 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 541 (or 524 counting only the distinct ones).

The product of its digits is 1990656, while the sum is 54.

The square root of 1818694944 is about 42646.1597802194. The cubic root of 1818694944 is about 1220.6372519600.

The spelling of 1818694944 in words is "one billion, eight hundred eighteen million, six hundred ninety-four thousand, nine hundred forty-four".