6517871890 has 16 divisors (see below), whose sum is σ = 11907277632. Its totient is φ = 2568235824.

The previous prime is 6517871881. The next prime is 6517871897. The reversal of 6517871890 is 981787156.

It is not an unprimeable number, because it can be changed into a prime (6517871897) 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, 4863414 + ... + 4864753.

It is an arithmetic number, because the mean of its divisors is an integer number (744204852).

Almost surely, 2^6517871890 is an apocalyptic number.

6517871890 is a deficient number, since it is larger than the sum of its proper divisors (5389405742).

6517871890 is a wasteful number, since it uses less digits than its factorization.

6517871890 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9728241.

The product of its (nonzero) digits is 846720, while the sum is 52.

The square root of 6517871890 is about 80733.3381571702. The cubic root of 6517871890 is about 1867.9644498077.

The spelling of 6517871890 in words is "six billion, five hundred seventeen million, eight hundred seventy-one thousand, eight hundred ninety".