40244791693 has 2 divisors, whose sum is σ = 40244791694. Its totient is φ = 40244791692.

The previous prime is 40244791669. The next prime is 40244791703. The reversal of 40244791693 is 39619744204.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 26620532964 + 13624258729 = 163158^2 + 116723^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40244791693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40244791393) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20122395846 + 20122395847.

It is an arithmetic number, because the mean of its divisors is an integer number (20122395847).

Almost surely, 2^40244791693 is an apocalyptic number.

It is an amenable number.

40244791693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40244791693 is an equidigital number, since it uses as much as digits as its factorization.

40244791693 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 1306368, while the sum is 49.

The spelling of 40244791693 in words is "forty billion, two hundred forty-four million, seven hundred ninety-one thousand, six hundred ninety-three".