4559427781 has 4 divisors (see below), whose sum is σ = 4566163212. Its totient is φ = 4552692352.

The previous prime is 4559427779. The next prime is 4559427797. The reversal of 4559427781 is 1877249554.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2458672225 + 2100755556 = 49585^2 + 45834^2 .

It is a cyclic number.

It is not a de Polignac number, because 4559427781 - 2¹ = 4559427779 is a prime.

It is a super-2 number, since 2×4559427781² = 41576763380309167922, which contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4559427721) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 3366700 + ... + 3368053.

It is an arithmetic number, because the mean of its divisors is an integer number (1141540803).

Almost surely, 2^4559427781 is an apocalyptic number.

It is an amenable number.

4559427781 is a deficient number, since it is larger than the sum of its proper divisors (6735431).

4559427781 is an equidigital number, since it uses as much as digits as its factorization.

4559427781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6735430.

The product of its digits is 2822400, while the sum is 52.

The square root of 4559427781 is about 67523.5350155781. The cubic root of 4559427781 is about 1658.1995019483.

The spelling of 4559427781 in words is "four billion, five hundred fifty-nine million, four hundred twenty-seven thousand, seven hundred eighty-one".