40515505549 has 2 divisors, whose sum is σ = 40515505550. Its totient is φ = 40515505548.

The previous prime is 40515505517. The next prime is 40515505573. The reversal of 40515505549 is 94550551504.

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., 40037208649 + 478296900 = 200093^2 + 21870^2 .

It is a cyclic number.

It is not a de Polignac number, because 40515505549 - 2⁵ = 40515505517 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40515505649) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20257752774 + 20257752775.

It is an arithmetic number, because the mean of its divisors is an integer number (20257752775).

Almost surely, 2^40515505549 is an apocalyptic number.

It is an amenable number.

40515505549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40515505549 is an equidigital number, since it uses as much as digits as its factorization.

40515505549 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 450000, while the sum is 43.

The spelling of 40515505549 in words is "forty billion, five hundred fifteen million, five hundred five thousand, five hundred forty-nine".