3791816640 has 84 divisors (see below), whose sum is σ = 13042279224. Its totient is φ = 1011150336.

The previous prime is 3791816599. The next prime is 3791816657. The reversal of 3791816640 is 466181973.

It is a happy number.

3791816640 is a `hidden beast` number, since 379 + 181 + 66 + 40 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 655422 + ... + 661181.

Almost surely, 2^3791816640 is an apocalyptic number.

3791816640 is a gapful number since it is divisible by the number (30) formed by its first and last digit.

It is an amenable number.

3791816640 is an abundant number, since it is smaller than the sum of its proper divisors (9250462584).

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

3791816640 is a wasteful number, since it uses less digits than its factorization.

3791816640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1316626 (or 1316613 counting only the distinct ones).

The product of its (nonzero) digits is 217728, while the sum is 45.

The square root of 3791816640 is about 61577.7284413772. The cubic root of 3791816640 is about 1559.3697651454.

The spelling of 3791816640 in words is "three billion, seven hundred ninety-one million, eight hundred sixteen thousand, six hundred forty".