12562960661 has 2 divisors, whose sum is σ = 12562960662. Its totient is φ = 12562960660.

The previous prime is 12562960643. The next prime is 12562960667. The reversal of 12562960661 is 16606926521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 12225503761 + 337456900 = 110569^2 + 18370^2 .

It is a cyclic number.

It is not a de Polignac number, because 12562960661 - 2¹⁰ = 12562959637 is a prime.

It is a super-3 number, since 3×12562960661³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12562960667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6281480330 + 6281480331.

It is an arithmetic number, because the mean of its divisors is an integer number (6281480331).

Almost surely, 2^12562960661 is an apocalyptic number.

It is an amenable number.

12562960661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12562960661 is an equidigital number, since it uses as much as digits as its factorization.

12562960661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 233280, while the sum is 44.

The spelling of 12562960661 in words is "twelve billion, five hundred sixty-two million, nine hundred sixty thousand, six hundred sixty-one".