40505517911 has 2 divisors, whose sum is σ = 40505517912. Its totient is φ = 40505517910.

The previous prime is 40505517847. The next prime is 40505517961. The reversal of 40505517911 is 11971550504.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 40505517911 - 2⁶ = 40505517847 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505517961) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20252758955 + 20252758956.

It is an arithmetic number, because the mean of its divisors is an integer number (20252758956).

Almost surely, 2^40505517911 is an apocalyptic number.

40505517911 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505517911 is an equidigital number, since it uses as much as digits as its factorization.

40505517911 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 31500, while the sum is 38.

The spelling of 40505517911 in words is "forty billion, five hundred five million, five hundred seventeen thousand, nine hundred eleven".