6565394490 has 32 divisors (see below), whose sum is σ = 15761056896. Its totient is φ = 1750315200.

The previous prime is 6565394471. The next prime is 6565394491. The reversal of 6565394490 is 944935656.

It is not an unprimeable number, because it can be changed into a prime (6565394491) 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, 97515 + ... + 150465.

It is an arithmetic number, because the mean of its divisors is an integer number (492533028).

Almost surely, 2^6565394490 is an apocalyptic number.

6565394490 is an abundant number, since it is smaller than the sum of its proper divisors (9195662406).

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

6565394490 is a wasteful number, since it uses less digits than its factorization.

6565394490 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 57094.

The product of its (nonzero) digits is 3499200, while the sum is 51.

The square root of 6565394490 is about 81027.1219407428. The cubic root of 6565394490 is about 1872.4933130599.

The spelling of 6565394490 in words is "six billion, five hundred sixty-five million, three hundred ninety-four thousand, four hundred ninety".