44545681 has 2 divisors, whose sum is σ = 44545682. Its totient is φ = 44545680.

The previous prime is 44545679. The next prime is 44545691. The reversal of 44545681 is 18654544.

44545681 is nontrivially palindromic in base 14.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 27248400 + 17297281 = 5220^2 + 4159^2 .

It is a cyclic number.

It is not a de Polignac number, because 44545681 - 2¹ = 44545679 is a prime.

It is a super-2 number, since 2×44545681² = 3968635391507522, which contains 22 as substring.

Together with 44545679, it forms a pair of twin primes.

It is a self number, because there is not a number n which added to its sum of digits gives 44545681.

It is not a weakly prime, because it can be changed into another prime (44545691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22272840 + 22272841.

It is an arithmetic number, because the mean of its divisors is an integer number (22272841).

Almost surely, 2^44545681 is an apocalyptic number.

It is an amenable number.

44545681 is a deficient number, since it is larger than the sum of its proper divisors (1).

44545681 is an equidigital number, since it uses as much as digits as its factorization.

44545681 is an evil number, because the sum of its binary digits is even.

The product of its digits is 76800, while the sum is 37.

The square root of 44545681 is about 6674.2550895212. The cubic root of 44545681 is about 354.4882688455.

The spelling of 44545681 in words is "forty-four million, five hundred forty-five thousand, six hundred eighty-one".