40406703740549 has 2 divisors, whose sum is σ = 40406703740550. Its totient is φ = 40406703740548.

The previous prime is 40406703740531. The next prime is 40406703740603. The reversal of 40406703740549 is 94504730760404.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 36803756892100 + 3602946848449 = 6066610^2 + 1898143^2 .

It is a cyclic number.

It is not a de Polignac number, because 40406703740549 - 2³⁶ = 40337984263813 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 40406703740549.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40406703740149) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20203351870274 + 20203351870275.

It is an arithmetic number, because the mean of its divisors is an integer number (20203351870275).

Almost surely, 2^{40406703740549} is an apocalyptic number.

It is an amenable number.

40406703740549 is a deficient number, since it is larger than the sum of its proper divisors (1).

40406703740549 is an equidigital number, since it uses as much as digits as its factorization.

40406703740549 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 10160640, while the sum is 53.

The spelling of 40406703740549 in words is "forty trillion, four hundred six billion, seven hundred three million, seven hundred forty thousand, five hundred forty-nine".