39440205361 has 2 divisors, whose sum is σ = 39440205362. Its totient is φ = 39440205360.

The previous prime is 39440205341. The next prime is 39440205373. The reversal of 39440205361 is 16350204493.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 33240217761 + 6199987600 = 182319^2 + 78740^2 .

It is a cyclic number.

It is not a de Polignac number, because 39440205361 - 2²⁵ = 39406650929 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39440205361.

It is not a weakly prime, because it can be changed into another prime (39440205341) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19720102680 + 19720102681.

It is an arithmetic number, because the mean of its divisors is an integer number (19720102681).

Almost surely, 2^39440205361 is an apocalyptic number.

It is an amenable number.

39440205361 is a deficient number, since it is larger than the sum of its proper divisors (1).

39440205361 is an equidigital number, since it uses as much as digits as its factorization.

39440205361 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 77760, while the sum is 37.

The spelling of 39440205361 in words is "thirty-nine billion, four hundred forty million, two hundred five thousand, three hundred sixty-one".