8401664490 has 32 divisors (see below), whose sum is σ = 20299334400. Its totient is φ = 2225406144.

The previous prime is 8401664483. The next prime is 8401664507. The reversal of 8401664490 is 944661048.

It is a Curzon number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 935314 + ... + 944253.

It is an arithmetic number, because the mean of its divisors is an integer number (634354200).

Almost surely, 2^8401664490 is an apocalyptic number.

8401664490 is an abundant number, since it is smaller than the sum of its proper divisors (11897669910).

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

8401664490 is a wasteful number, since it uses less digits than its factorization.

8401664490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1879726.

The product of its (nonzero) digits is 165888, while the sum is 42.

The square root of 8401664490 is about 91660.5939867291. The cubic root of 8401664490 is about 2032.9269731408.

The spelling of 8401664490 in words is "eight billion, four hundred one million, six hundred sixty-four thousand, four hundred ninety".