544881561 has 8 divisors (see below), whose sum is σ = 830295744. Its totient is φ = 311360880.

The previous prime is 544881541. The next prime is 544881581. The reversal of 544881561 is 165188445.

544881561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (544881541) and next prime (544881581).

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

It is not a de Polignac number, because 544881561 - 2⁹ = 544881049 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (544881541) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 12973350 + ... + 12973391.

It is an arithmetic number, because the mean of its divisors is an integer number (103786968).

Almost surely, 2^544881561 is an apocalyptic number.

It is an amenable number.

544881561 is a deficient number, since it is larger than the sum of its proper divisors (285414183).

544881561 is a wasteful number, since it uses less digits than its factorization.

544881561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25946751.

The product of its digits is 153600, while the sum is 42.

The square root of 544881561 is about 23342.6982373504. The cubic root of 544881561 is about 816.7717417117.

The spelling of 544881561 in words is "five hundred forty-four million, eight hundred eighty-one thousand, five hundred sixty-one".