40459572397 has 2 divisors, whose sum is σ = 40459572398. Its totient is φ = 40459572396.

The previous prime is 40459572383. The next prime is 40459572403. The reversal of 40459572397 is 79327595404.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 34559181801 + 5900390596 = 185901^2 + 76814^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40459572397 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40459572347) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20229786198 + 20229786199.

It is an arithmetic number, because the mean of its divisors is an integer number (20229786199).

Almost surely, 2^40459572397 is an apocalyptic number.

It is an amenable number.

40459572397 is a deficient number, since it is larger than the sum of its proper divisors (1).

40459572397 is an equidigital number, since it uses as much as digits as its factorization.

40459572397 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 9525600, while the sum is 55.

The spelling of 40459572397 in words is "forty billion, four hundred fifty-nine million, five hundred seventy-two thousand, three hundred ninety-seven".