12576067561 has 2 divisors, whose sum is σ = 12576067562. Its totient is φ = 12576067560.

The previous prime is 12576067549. The next prime is 12576067571. The reversal of 12576067561 is 16576067521.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 7583797225 + 4992270336 = 87085^2 + 70656^2 .

It is a cyclic number.

It is not a de Polignac number, because 12576067561 - 2¹⁷ = 12575936489 is a prime.

It is not a weakly prime, because it can be changed into another prime (12576067531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6288033780 + 6288033781.

It is an arithmetic number, because the mean of its divisors is an integer number (6288033781).

Almost surely, 2^12576067561 is an apocalyptic number.

It is an amenable number.

12576067561 is a deficient number, since it is larger than the sum of its proper divisors (1).

12576067561 is an equidigital number, since it uses as much as digits as its factorization.

12576067561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 529200, while the sum is 46.

The spelling of 12576067561 in words is "twelve billion, five hundred seventy-six million, sixty-seven thousand, five hundred sixty-one".