40505517847 has 2 divisors, whose sum is σ = 40505517848. Its totient is φ = 40505517846.

The previous prime is 40505517803. The next prime is 40505517911. The reversal of 40505517847 is 74871550504.

40505517847 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 40505517847 - 2⁷ = 40505517719 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 40505517797 and 40505517806.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505515847) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252758923 + 20252758924.

It is an arithmetic number, because the mean of its divisors is an integer number (20252758924).

Almost surely, 2^40505517847 is an apocalyptic number.

40505517847 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505517847 is an equidigital number, since it uses as much as digits as its factorization.

40505517847 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 784000, while the sum is 46.

The spelling of 40505517847 in words is "forty billion, five hundred five million, five hundred seventeen thousand, eight hundred forty-seven".