445644131617 has 2 divisors, whose sum is σ = 445644131618. Its totient is φ = 445644131616.

The previous prime is 445644131591. The next prime is 445644131623. The reversal of 445644131617 is 716131446544.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 355998382336 + 89645749281 = 596656^2 + 299409^2 .

It is a cyclic number.

It is not a de Polignac number, because 445644131617 - 2²³ = 445635743009 is a prime.

It is not a weakly prime, because it can be changed into another prime (445644161617) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 222822065808 + 222822065809.

It is an arithmetic number, because the mean of its divisors is an integer number (222822065809).

Almost surely, 2^445644131617 is an apocalyptic number.

It is an amenable number.

445644131617 is a deficient number, since it is larger than the sum of its proper divisors (1).

445644131617 is an equidigital number, since it uses as much as digits as its factorization.

445644131617 is an evil number, because the sum of its binary digits is even.

The product of its digits is 967680, while the sum is 46.

The spelling of 445644131617 in words is "four hundred forty-five billion, six hundred forty-four million, one hundred thirty-one thousand, six hundred seventeen".