39646464679 has 2 divisors, whose sum is σ = 39646464680. Its totient is φ = 39646464678.

The previous prime is 39646464653. The next prime is 39646464691. The reversal of 39646464679 is 97646464693.

39646464679 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 is a cyclic number.

It is not a de Polignac number, because 39646464679 - 2¹¹ = 39646462631 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 39646464679.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (39646464629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 19823232339 + 19823232340.

It is an arithmetic number, because the mean of its divisors is an integer number (19823232340).

Almost surely, 2^39646464679 is an apocalyptic number.

39646464679 is a deficient number, since it is larger than the sum of its proper divisors (1).

39646464679 is an equidigital number, since it uses as much as digits as its factorization.

39646464679 is an evil number, because the sum of its binary digits is even.

The product of its digits is 141087744, while the sum is 64.

The spelling of 39646464679 in words is "thirty-nine billion, six hundred forty-six million, four hundred sixty-four thousand, six hundred seventy-nine".