44591881657 has 2 divisors, whose sum is σ = 44591881658. Its totient is φ = 44591881656.

The previous prime is 44591881643. The next prime is 44591881661. The reversal of 44591881657 is 75618819544.

44591881657 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 can be written as a sum of positive squares in only one way, i.e., 34497861696 + 10094019961 = 185736^2 + 100469^2 .

It is a cyclic number.

It is not a de Polignac number, because 44591881657 - 2²³ = 44583493049 is a prime.

It is not a weakly prime, because it can be changed into another prime (44591881627) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 22295940828 + 22295940829.

It is an arithmetic number, because the mean of its divisors is an integer number (22295940829).

Almost surely, 2^44591881657 is an apocalyptic number.

It is an amenable number.

44591881657 is a deficient number, since it is larger than the sum of its proper divisors (1).

44591881657 is an equidigital number, since it uses as much as digits as its factorization.

44591881657 is an evil number, because the sum of its binary digits is even.

The product of its digits is 9676800, while the sum is 58.

The spelling of 44591881657 in words is "forty-four billion, five hundred ninety-one million, eight hundred eighty-one thousand, six hundred fifty-seven".