12985520761 has 2 divisors, whose sum is σ = 12985520762. Its totient is φ = 12985520760.

The previous prime is 12985520707. The next prime is 12985520773. The reversal of 12985520761 is 16702558921.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 9511125625 + 3474395136 = 97525^2 + 58944^2 .

It is a cyclic number.

It is not a de Polignac number, because 12985520761 - 2⁷ = 12985520633 is a prime.

It is not a weakly prime, because it can be changed into another prime (12985521761) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6492760380 + 6492760381.

It is an arithmetic number, because the mean of its divisors is an integer number (6492760381).

Almost surely, 2^12985520761 is an apocalyptic number.

It is an amenable number.

12985520761 is a deficient number, since it is larger than the sum of its proper divisors (1).

12985520761 is an equidigital number, since it uses as much as digits as its factorization.

12985520761 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 302400, while the sum is 46.

The spelling of 12985520761 in words is "twelve billion, nine hundred eighty-five million, five hundred twenty thousand, seven hundred sixty-one".