40005287449 has 2 divisors, whose sum is σ = 40005287450. Its totient is φ = 40005287448.

The previous prime is 40005287407. The next prime is 40005287467. The reversal of 40005287449 is 94478250004.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 39616921600 + 388365849 = 199040^2 + 19707^2 .

It is a cyclic number.

It is not a de Polignac number, because 40005287449 - 2²⁵ = 39971733017 is a prime.

It is not a weakly prime, because it can be changed into another prime (40005287549) 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, 20002643724 + 20002643725.

It is an arithmetic number, because the mean of its divisors is an integer number (20002643725).

Almost surely, 2^40005287449 is an apocalyptic number.

It is an amenable number.

40005287449 is a deficient number, since it is larger than the sum of its proper divisors (1).

40005287449 is an equidigital number, since it uses as much as digits as its factorization.

40005287449 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 322560, while the sum is 43.

The spelling of 40005287449 in words is "forty billion, five million, two hundred eighty-seven thousand, four hundred forty-nine".