8381664490 has 64 divisors (see below), whose sum is σ = 15937067520. Its totient is φ = 3170502720.

The previous prime is 8381664443. The next prime is 8381664607. The reversal of 8381664490 is 944661838.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1697325 + ... + 1702255.

It is an arithmetic number, because the mean of its divisors is an integer number (249016680).

Almost surely, 2^8381664490 is an apocalyptic number.

8381664490 is a deficient number, since it is larger than the sum of its proper divisors (7555403030).

8381664490 is a wasteful number, since it uses less digits than its factorization.

8381664490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5107.

The product of its (nonzero) digits is 995328, while the sum is 49.

The square root of 8381664490 is about 91551.4308462735. The cubic root of 8381664490 is about 2031.3125769881.

The spelling of 8381664490 in words is "eight billion, three hundred eighty-one million, six hundred sixty-four thousand, four hundred ninety".