4431354561 has 48 divisors (see below), whose sum is σ = 6733446720. Its totient is φ = 2912034240.

The previous prime is 4431354523. The next prime is 4431354671. The reversal of 4431354561 is 1654531344.

4431354561 is a `hidden beast` number, since 4 + 43 + 1 + 3 + 54 + 561 = 666.

It is not a de Polignac number, because 4431354561 - 2⁹ = 4431354049 is a prime.

It is not an unprimeable number, because it can be changed into a prime (4431354761) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 7760406 + ... + 7760976.

It is an arithmetic number, because the mean of its divisors is an integer number (140280140).

Almost surely, 2^4431354561 is an apocalyptic number.

It is an amenable number.

4431354561 is a deficient number, since it is larger than the sum of its proper divisors (2302092159).

4431354561 is a wasteful number, since it uses less digits than its factorization.

4431354561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 988 (or 976 counting only the distinct ones).

The product of its digits is 86400, while the sum is 36.

The square root of 4431354561 is about 66568.4201479951. The cubic root of 4431354561 is about 1642.5256742093.

The spelling of 4431354561 in words is "four billion, four hundred thirty-one million, three hundred fifty-four thousand, five hundred sixty-one".