40545664508693 has 2 divisors, whose sum is σ = 40545664508694. Its totient is φ = 40545664508692.

The previous prime is 40545664508683. The next prime is 40545664508717. The reversal of 40545664508693 is 39680546654504.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 29702750700529 + 10842913808164 = 5450023^2 + 3292858^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-40545664508693 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40545664508653) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20272832254346 + 20272832254347.

It is an arithmetic number, because the mean of its divisors is an integer number (20272832254347).

Almost surely, 2^{40545664508693} is an apocalyptic number.

It is an amenable number.

40545664508693 is a deficient number, since it is larger than the sum of its proper divisors (1).

40545664508693 is an equidigital number, since it uses as much as digits as its factorization.

40545664508693 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 373248000, while the sum is 65.

The spelling of 40545664508693 in words is "forty trillion, five hundred forty-five billion, six hundred sixty-four million, five hundred eight thousand, six hundred ninety-three".