40512523169 has 2 divisors, whose sum is σ = 40512523170. Its totient is φ = 40512523168.

The previous prime is 40512523123. The next prime is 40512523201. The reversal of 40512523169 is 96132521504.

40512523169 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., 27456490000 + 13056033169 = 165700^2 + 114263^2 .

It is a cyclic number.

It is not a de Polignac number, because 40512523169 - 2⁸ = 40512522913 is a prime.

It is a super-2 number, since 2×40512523169² (a number of 22 digits) contains 22 as substring.

It is a Sophie Germain prime.

It is a Curzon number.

It is not a weakly prime, because it can be changed into another prime (40512528169) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20256261584 + 20256261585.

It is an arithmetic number, because the mean of its divisors is an integer number (20256261585).

Almost surely, 2^40512523169 is an apocalyptic number.

It is an amenable number.

40512523169 is a deficient number, since it is larger than the sum of its proper divisors (1).

40512523169 is an equidigital number, since it uses as much as digits as its factorization.

40512523169 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 64800, while the sum is 38.

The spelling of 40512523169 in words is "forty billion, five hundred twelve million, five hundred twenty-three thousand, one hundred sixty-nine".