1812542816 has 48 divisors (see below), whose sum is σ = 4087190016. Its totient is φ = 775095936.

The previous prime is 1812542783. The next prime is 1812542861. The reversal of 1812542816 is 6182452181.

It is a super-2 number, since 2×1812542816² = 6570622919666419712, which contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 1812542816.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 95945 + ... + 113271.

It is an arithmetic number, because the mean of its divisors is an integer number (85149792).

Almost surely, 2^1812542816 is an apocalyptic number.

1812542816 is a gapful number since it is divisible by the number (16) 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 1812542816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2043595008).

1812542816 is an abundant number, since it is smaller than the sum of its proper divisors (2274647200).

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

1812542816 is a wasteful number, since it uses less digits than its factorization.

1812542816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17811 (or 17803 counting only the distinct ones).

The product of its digits is 30720, while the sum is 38.

The square root of 1812542816 is about 42573.9687602648. The cubic root of 1812542816 is about 1219.2593408174.

Adding to 1812542816 its reverse (6182452181), we get a palindrome (7994994997).

The spelling of 1812542816 in words is "one billion, eight hundred twelve million, five hundred forty-two thousand, eight hundred sixteen".