1818195264 has 168 divisors, whose sum is σ = 5517562752. Its totient is φ = 571253760.

The previous prime is 1818195259. The next prime is 1818195311. The reversal of 1818195264 is 4625918181.

It is a happy number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 939642 + ... + 941574.

Almost surely, 2^1818195264 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 1818195264, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2758781376).

1818195264 is an abundant number, since it is smaller than the sum of its proper divisors (3699367488).

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

1818195264 is a wasteful number, since it uses less digits than its factorization.

1818195264 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2045 (or 2032 counting only the distinct ones).

The product of its digits is 138240, while the sum is 45.

The square root of 1818195264 is about 42640.3009370244. The cubic root of 1818195264 is about 1220.5254531321.

The spelling of 1818195264 in words is "one billion, eight hundred eighteen million, one hundred ninety-five thousand, two hundred sixty-four".