44272912561 has 4 divisors (see below), whose sum is σ = 45214889472. Its totient is φ = 43330935652.

The previous prime is 44272912517. The next prime is 44272912573. The reversal of 44272912561 is 16521927244.

44272912561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 44272912561 - 2⁷ = 44272912433 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (44272912361) 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, 470988385 + ... + 470988478.

It is an arithmetic number, because the mean of its divisors is an integer number (11303722368).

Almost surely, 2^44272912561 is an apocalyptic number.

It is an amenable number.

44272912561 is a deficient number, since it is larger than the sum of its proper divisors (941976911).

44272912561 is an equidigital number, since it uses as much as digits as its factorization.

44272912561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 941976910.

The product of its digits is 241920, while the sum is 43.

The spelling of 44272912561 in words is "forty-four billion, two hundred seventy-two million, nine hundred twelve thousand, five hundred sixty-one".