3811816640 has 28 divisors (see below), whose sum is σ = 9076889136. Its totient is φ = 1524726528.

The previous prime is 3811816639. The next prime is 3811816643. The reversal of 3811816640 is 466181183.

It is a hoax number, since the sum of its digits (38) coincides with the sum of the digits of its distinct prime factors.

It is a junction number, because it is equal to n+sod(n) for n = 3811816594 and 3811816603.

It is not an unprimeable number, because it can be changed into a prime (3811816643) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5955644 + ... + 5956283.

It is an arithmetic number, because the mean of its divisors is an integer number (324174612).

Almost surely, 2^3811816640 is an apocalyptic number.

It is an amenable number.

3811816640 is an abundant number, since it is smaller than the sum of its proper divisors (5265072496).

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

3811816640 is a wasteful number, since it uses less digits than its factorization.

3811816640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11911944 (or 11911934 counting only the distinct ones).

The product of its (nonzero) digits is 27648, while the sum is 38.

The square root of 3811816640 is about 61739.9112406229. The cubic root of 3811816640 is about 1562.1065995407.

The spelling of 3811816640 in words is "three billion, eight hundred eleven million, eight hundred sixteen thousand, six hundred forty".