42564972529 has 2 divisors, whose sum is σ = 42564972530. Its totient is φ = 42564972528.

The previous prime is 42564972523. The next prime is 42564972539. The reversal of 42564972529 is 92527946524.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 32006999025 + 10557973504 = 178905^2 + 102752^2 .

It is a cyclic number.

It is not a de Polignac number, because 42564972529 - 2⁹ = 42564972017 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 42564972529.

It is not a weakly prime, because it can be changed into another prime (42564972523) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 21282486264 + 21282486265.

It is an arithmetic number, because the mean of its divisors is an integer number (21282486265).

Almost surely, 2^42564972529 is an apocalyptic number.

It is an amenable number.

42564972529 is a deficient number, since it is larger than the sum of its proper divisors (1).

42564972529 is an equidigital number, since it uses as much as digits as its factorization.

42564972529 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 10886400, while the sum is 55.

The spelling of 42564972529 in words is "forty-two billion, five hundred sixty-four million, nine hundred seventy-two thousand, five hundred twenty-nine".