40023263509 has 2 divisors, whose sum is σ = 40023263510. Its totient is φ = 40023263508.

The previous prime is 40023263491. The next prime is 40023263537. The reversal of 40023263509 is 90536232004.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 35712684484 + 4310579025 = 188978^2 + 65655^2 .

It is a cyclic number.

It is not a de Polignac number, because 40023263509 - 2⁹ = 40023262997 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (40023263569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20011631754 + 20011631755.

It is an arithmetic number, because the mean of its divisors is an integer number (20011631755).

Almost surely, 2^40023263509 is an apocalyptic number.

It is an amenable number.

40023263509 is a deficient number, since it is larger than the sum of its proper divisors (1).

40023263509 is an equidigital number, since it uses as much as digits as its factorization.

40023263509 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 38880, while the sum is 34.

The spelling of 40023263509 in words is "forty billion, twenty-three million, two hundred sixty-three thousand, five hundred nine".