40071640493 has 2 divisors, whose sum is σ = 40071640494. Its totient is φ = 40071640492.

The previous prime is 40071640489. The next prime is 40071640501. The reversal of 40071640493 is 39404617004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 25863715684 + 14207924809 = 160822^2 + 119197^2 .

It is a cyclic number.

It is not a de Polignac number, because 40071640493 - 2² = 40071640489 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40071642493) 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, 20035820246 + 20035820247.

It is an arithmetic number, because the mean of its divisors is an integer number (20035820247).

Almost surely, 2^40071640493 is an apocalyptic number.

It is an amenable number.

40071640493 is a deficient number, since it is larger than the sum of its proper divisors (1).

40071640493 is an equidigital number, since it uses as much as digits as its factorization.

40071640493 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 72576, while the sum is 38.

The spelling of 40071640493 in words is "forty billion, seventy-one million, six hundred forty thousand, four hundred ninety-three".