44947221561 has 36 divisors (see below), whose sum is σ = 72880918656. Its totient is φ = 26661119760.

The previous prime is 44947221559. The next prime is 44947221623. The reversal of 44947221561 is 16512274944.

44947221561 is a `hidden beast` number, since 4 + 49 + 47 + 2 + 2 + 1 + 561 = 666.

It is not a de Polignac number, because 44947221561 - 2¹ = 44947221559 is a prime.

It is not an unprimeable number, because it can be changed into a prime (44947221511) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 387901 + ... + 490266.

Almost surely, 2^44947221561 is an apocalyptic number.

It is an amenable number.

44947221561 is a deficient number, since it is larger than the sum of its proper divisors (27933697095).

44947221561 is a wasteful number, since it uses less digits than its factorization.

44947221561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 878242 (or 878228 counting only the distinct ones).

The product of its digits is 483840, while the sum is 45.

The spelling of 44947221561 in words is "forty-four billion, nine hundred forty-seven million, two hundred twenty-one thousand, five hundred sixty-one".