6440845087 has 8 divisors (see below), whose sum is σ = 6604177536. Its totient is φ = 6279061152.

The previous prime is 6440845051. The next prime is 6440845091. The reversal of 6440845087 is 7805480446.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 6440845087 - 2²⁷ = 6306627359 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 (6440845007) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 378703 + ... + 395344.

It is an arithmetic number, because the mean of its divisors is an integer number (825522192).

Almost surely, 2^6440845087 is an apocalyptic number.

6440845087 is a deficient number, since it is larger than the sum of its proper divisors (163332449).

6440845087 is a wasteful number, since it uses less digits than its factorization.

6440845087 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 774257.

The product of its (nonzero) digits is 860160, while the sum is 46.

The square root of 6440845087 is about 80254.8757833442. The cubic root of 6440845087 is about 1860.5768711117.

The spelling of 6440845087 in words is "six billion, four hundred forty million, eight hundred forty-five thousand, eighty-seven".