40544664647 has 2 divisors, whose sum is σ = 40544664648. Its totient is φ = 40544664646.

The previous prime is 40544664599. The next prime is 40544664659. The reversal of 40544664647 is 74646644504.

It is a happy number.

40544664647 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 40544664647 - 2⁶ = 40544664583 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40544664595 and 40544664604.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40544663647) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272332323 + 20272332324.

It is an arithmetic number, because the mean of its divisors is an integer number (20272332324).

Almost surely, 2^40544664647 is an apocalyptic number.

40544664647 is a deficient number, since it is larger than the sum of its proper divisors (1).

40544664647 is an equidigital number, since it uses as much as digits as its factorization.

40544664647 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 7741440, while the sum is 50.

The spelling of 40544664647 in words is "forty billion, five hundred forty-four million, six hundred sixty-four thousand, six hundred forty-seven".