40505501893 has 2 divisors, whose sum is σ = 40505501894. Its totient is φ = 40505501892.

The previous prime is 40505501887. The next prime is 40505501923. The reversal of 40505501893 is 39810550504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35026245409 + 5479256484 = 187153^2 + 74022^2 .

It is a cyclic number.

It is not a de Polignac number, because 40505501893 - 2⁹ = 40505501381 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40505501863) 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, 20252750946 + 20252750947.

It is an arithmetic number, because the mean of its divisors is an integer number (20252750947).

Almost surely, 2^40505501893 is an apocalyptic number.

It is an amenable number.

40505501893 is a deficient number, since it is larger than the sum of its proper divisors (1).

40505501893 is an equidigital number, since it uses as much as digits as its factorization.

40505501893 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 108000, while the sum is 40.

The spelling of 40505501893 in words is "forty billion, five hundred five million, five hundred one thousand, eight hundred ninety-three".