40323010561 has 2 divisors, whose sum is σ = 40323010562. Its totient is φ = 40323010560.

The previous prime is 40323010543. The next prime is 40323010573. The reversal of 40323010561 is 16501032304.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 35298894400 + 5024116161 = 187880^2 + 70881^2 .

It is a cyclic number.

It is not a de Polignac number, because 40323010561 - 2²⁹ = 39786139649 is a prime.

It is not a weakly prime, because it can be changed into another prime (40323010591) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 20161505280 + 20161505281.

It is an arithmetic number, because the mean of its divisors is an integer number (20161505281).

Almost surely, 2^40323010561 is an apocalyptic number.

It is an amenable number.

40323010561 is a deficient number, since it is larger than the sum of its proper divisors (1).

40323010561 is an equidigital number, since it uses as much as digits as its factorization.

40323010561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2160, while the sum is 25.

Adding to 40323010561 its reverse (16501032304), we get a palindrome (56824042865).

The spelling of 40323010561 in words is "forty billion, three hundred twenty-three million, ten thousand, five hundred sixty-one".