44564485681 has 2 divisors, whose sum is σ = 44564485682. Its totient is φ = 44564485680.

The previous prime is 44564485607. The next prime is 44564485699. The reversal of 44564485681 is 18658446544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 27277495281 + 17286990400 = 165159^2 + 131480^2 .

It is a cyclic number.

It is not a de Polignac number, because 44564485681 - 2¹⁷ = 44564354609 is a prime.

It is a super-2 number, since 2×44564485681² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (44564482681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22282242840 + 22282242841.

It is an arithmetic number, because the mean of its divisors is an integer number (22282242841).

Almost surely, 2^44564485681 is an apocalyptic number.

It is an amenable number.

44564485681 is a deficient number, since it is larger than the sum of its proper divisors (1).

44564485681 is an equidigital number, since it uses as much as digits as its factorization.

44564485681 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 14745600, while the sum is 55.

The spelling of 44564485681 in words is "forty-four billion, five hundred sixty-four million, four hundred eighty-five thousand, six hundred eighty-one".