1816459316 has 96 divisors (see below), whose sum is σ = 4064256000. Its totient is φ = 692043264.

The previous prime is 1816459303. The next prime is 1816459321. The reversal of 1816459316 is 6139546181.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 907685 + ... + 909683.

It is an arithmetic number, because the mean of its divisors is an integer number (42336000).

Almost surely, 2^1816459316 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 1816459316, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2032128000).

1816459316 is an abundant number, since it is smaller than the sum of its proper divisors (2247796684).

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

1816459316 is a wasteful number, since it uses less digits than its factorization.

1816459316 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2133 (or 2131 counting only the distinct ones).

The product of its digits is 155520, while the sum is 44.

The square root of 1816459316 is about 42619.9403565983. The cubic root of 1816459316 is about 1220.1368913849.

The spelling of 1816459316 in words is "one billion, eight hundred sixteen million, four hundred fifty-nine thousand, three hundred sixteen".