44591881643 has 2 divisors, whose sum is σ = 44591881644. Its totient is φ = 44591881642.

The previous prime is 44591881627. The next prime is 44591881657. The reversal of 44591881643 is 34618819544.

It is a happy number.

44591881643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 44591881643 - 2⁴ = 44591881627 is a prime.

It is a Sophie Germain prime.

It is not a weakly prime, because it can be changed into another prime (44591881673) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22295940821 + 22295940822.

It is an arithmetic number, because the mean of its divisors is an integer number (22295940822).

Almost surely, 2^44591881643 is an apocalyptic number.

44591881643 is a deficient number, since it is larger than the sum of its proper divisors (1).

44591881643 is an equidigital number, since it uses as much as digits as its factorization.

44591881643 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3317760, while the sum is 53.

The spelling of 44591881643 in words is "forty-four billion, five hundred ninety-one million, eight hundred eighty-one thousand, six hundred forty-three".