4431145566 has 8 divisors (see below), whose sum is σ = 8862291144. Its totient is φ = 1477048520.

The previous prime is 4431145559. The next prime is 4431145573. The reversal of 4431145566 is 6655411344.

It is an interprime number because it is at equal distance from previous prime (4431145559) and next prime (4431145573).

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

4431145566 is an admirable number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 369262125 + ... + 369262136.

It is an arithmetic number, because the mean of its divisors is an integer number (1107786393).

Almost surely, 2^4431145566 is an apocalyptic number.

4431145566 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

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

4431145566 is a wasteful number, since it uses less digits than its factorization.

4431145566 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 738524266.

The product of its digits is 172800, while the sum is 39.

The square root of 4431145566 is about 66566.8503536107. The cubic root of 4431145566 is about 1642.4998517777.

The spelling of 4431145566 in words is "four billion, four hundred thirty-one million, one hundred forty-five thousand, five hundred sixty-six".