40203666593 has 2 divisors, whose sum is σ = 40203666594. Its totient is φ = 40203666592.

The previous prime is 40203666589. The next prime is 40203666611. The reversal of 40203666593 is 39566630204.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 37051630144 + 3152036449 = 192488^2 + 56143^2 .

It is a cyclic number.

It is not a de Polignac number, because 40203666593 - 2² = 40203666589 is a prime.

It is a super-2 number, since 2×40203666593² (a number of 22 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (40203666563) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20101833296 + 20101833297.

It is an arithmetic number, because the mean of its divisors is an integer number (20101833297).

Almost surely, 2^40203666593 is an apocalyptic number.

It is an amenable number.

40203666593 is a deficient number, since it is larger than the sum of its proper divisors (1).

40203666593 is an equidigital number, since it uses as much as digits as its factorization.

40203666593 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 699840, while the sum is 44.

The spelling of 40203666593 in words is "forty billion, two hundred three million, six hundred sixty-six thousand, five hundred ninety-three".