39945168841 has 2 divisors, whose sum is σ = 39945168842. Its totient is φ = 39945168840.

The previous prime is 39945168827. The next prime is 39945168853. The reversal of 39945168841 is 14886154993.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39838563216 + 106605625 = 199596^2 + 10325^2 .

It is a cyclic number.

It is not a de Polignac number, because 39945168841 - 2³¹ = 37797685193 is a prime.

It is not a weakly prime, because it can be changed into another prime (39945168811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19972584420 + 19972584421.

It is an arithmetic number, because the mean of its divisors is an integer number (19972584421).

Almost surely, 2^39945168841 is an apocalyptic number.

It is an amenable number.

39945168841 is a deficient number, since it is larger than the sum of its proper divisors (1).

39945168841 is an equidigital number, since it uses as much as digits as its factorization.

39945168841 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7464960, while the sum is 58.

The spelling of 39945168841 in words is "thirty-nine billion, nine hundred forty-five million, one hundred sixty-eight thousand, eight hundred forty-one".