3811623816 has 256 divisors, whose sum is σ = 13237862400. Its totient is φ = 882201600.

The previous prime is 3811623799. The next prime is 3811623821. The reversal of 3811623816 is 6183261183.

It is a super-2 number, since 2×3811623816² = 29056952229396803712, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (39).

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 63 ways as a sum of consecutive naturals, for example, 693961 + ... + 699431.

It is an arithmetic number, because the mean of its divisors is an integer number (51710400).

Almost surely, 2^3811623816 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 3811623816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (6618931200).

3811623816 is an abundant number, since it is smaller than the sum of its proper divisors (9426238584).

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

3811623816 is a wasteful number, since it uses less digits than its factorization.

3811623816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5540 (or 5536 counting only the distinct ones).

The product of its digits is 41472, while the sum is 39.

The square root of 3811623816 is about 61738.3496378062. The cubic root of 3811623816 is about 1562.0802589311.

Adding to 3811623816 its reverse (6183261183), we get a palindrome (9994884999).

The spelling of 3811623816 in words is "three billion, eight hundred eleven million, six hundred twenty-three thousand, eight hundred sixteen".