40569512257 has 2 divisors, whose sum is σ = 40569512258. Its totient is φ = 40569512256.

The previous prime is 40569512183. The next prime is 40569512323. The reversal of 40569512257 is 75221596504.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39380021136 + 1189491121 = 198444^2 + 34489^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40569512257 is a prime.

It is not a weakly prime, because it can be changed into another prime (40569512857) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20284756128 + 20284756129.

It is an arithmetic number, because the mean of its divisors is an integer number (20284756129).

Almost surely, 2^40569512257 is an apocalyptic number.

It is an amenable number.

40569512257 is a deficient number, since it is larger than the sum of its proper divisors (1).

40569512257 is an equidigital number, since it uses as much as digits as its factorization.

40569512257 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 756000, while the sum is 46.

It can be divided in two parts, 40569 and 512257, that added together give a triangular number (552826 = T₁₀₅₁).

The spelling of 40569512257 in words is "forty billion, five hundred sixty-nine million, five hundred twelve thousand, two hundred fifty-seven".