6463091887 has 16 divisors (see below), whose sum is σ = 7420868352. Its totient is φ = 5513981760.

The previous prime is 6463091879. The next prime is 6463091893. The reversal of 6463091887 is 7881903646.

It is a happy number.

6463091887 is digitally balanced in base 3, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 6463091887 - 2³ = 6463091879 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (6463091827) 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, 3388188 + ... + 3390094.

It is an arithmetic number, because the mean of its divisors is an integer number (463804272).

Almost surely, 2^6463091887 is an apocalyptic number.

6463091887 is a deficient number, since it is larger than the sum of its proper divisors (957776465).

6463091887 is a wasteful number, since it uses less digits than its factorization.

6463091887 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3918.

The product of its (nonzero) digits is 1741824, while the sum is 52.

The square root of 6463091887 is about 80393.3572318012. The cubic root of 6463091887 is about 1862.7165653135.

The spelling of 6463091887 in words is "six billion, four hundred sixty-three million, ninety-one thousand, eight hundred eighty-seven".