3243636816 has 80 divisors (see below), whose sum is σ = 9671369088. Its totient is φ = 917568000.

The previous prime is 3243636811. The next prime is 3243636821. The reversal of 3243636816 is 6186363423.

It is an interprime number because it is at equal distance from previous prime (3243636811) and next prime (3243636821).

It is a super-2 number, since 2×3243636816² = 21042359588221235712, which contains 22 as substring.

It is a hoax number, since the sum of its digits (42) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (42).

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (3243636811) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 13855 + ... + 81726.

Almost surely, 2^3243636816 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 3243636816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4835684544).

3243636816 is an abundant number, since it is smaller than the sum of its proper divisors (6427732272).

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

3243636816 is a wasteful number, since it uses less digits than its factorization.

3243636816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 95700 (or 95694 counting only the distinct ones).

The product of its digits is 373248, while the sum is 42.

The square root of 3243636816 is about 56952.9350955682. The cubic root of 3243636816 is about 1480.2806893970.

The spelling of 3243636816 in words is "three billion, two hundred forty-three million, six hundred thirty-six thousand, eight hundred sixteen".