39840316457 has 2 divisors, whose sum is σ = 39840316458. Its totient is φ = 39840316456.

The previous prime is 39840316393. The next prime is 39840316501. The reversal of 39840316457 is 75461304893.

39840316457 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., 39631253776 + 209062681 = 199076^2 + 14459^2 .

It is a cyclic number.

It is not a de Polignac number, because 39840316457 - 2⁶ = 39840316393 is a prime.

It is not a weakly prime, because it can be changed into another prime (39840310457) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19920158228 + 19920158229.

It is an arithmetic number, because the mean of its divisors is an integer number (19920158229).

Almost surely, 2^39840316457 is an apocalyptic number.

It is an amenable number.

39840316457 is a deficient number, since it is larger than the sum of its proper divisors (1).

39840316457 is an equidigital number, since it uses as much as digits as its factorization.

39840316457 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2177280, while the sum is 50.

The spelling of 39840316457 in words is "thirty-nine billion, eight hundred forty million, three hundred sixteen thousand, four hundred fifty-seven".