39345644077 has 2 divisors, whose sum is σ = 39345644078. Its totient is φ = 39345644076.

The previous prime is 39345644027. The next prime is 39345644081. The reversal of 39345644077 is 77044654393.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26523705321 + 12821938756 = 162861^2 + 113234^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-39345644077 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39345644027) 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, 19672822038 + 19672822039.

It is an arithmetic number, because the mean of its divisors is an integer number (19672822039).

Almost surely, 2^39345644077 is an apocalyptic number.

It is an amenable number.

39345644077 is a deficient number, since it is larger than the sum of its proper divisors (1).

39345644077 is an equidigital number, since it uses as much as digits as its factorization.

39345644077 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 7620480, while the sum is 52.

The spelling of 39345644077 in words is "thirty-nine billion, three hundred forty-five million, six hundred forty-four thousand, seventy-seven".