40026251549 has 2 divisors, whose sum is σ = 40026251550. Its totient is φ = 40026251548.

The previous prime is 40026251483. The next prime is 40026251567. The reversal of 40026251549 is 94515262004.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 32226712324 + 7799539225 = 179518^2 + 88315^2 .

It is a cyclic number.

It is not a de Polignac number, because 40026251549 - 2²⁸ = 39757816093 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40026211549) 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, 20013125774 + 20013125775.

It is an arithmetic number, because the mean of its divisors is an integer number (20013125775).

Almost surely, 2^40026251549 is an apocalyptic number.

It is an amenable number.

40026251549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40026251549 is an equidigital number, since it uses as much as digits as its factorization.

40026251549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 38.

The spelling of 40026251549 in words is "forty billion, twenty-six million, two hundred fifty-one thousand, five hundred forty-nine".