12535290661 has 2 divisors, whose sum is σ = 12535290662. Its totient is φ = 12535290660.

The previous prime is 12535290613. The next prime is 12535290667. The reversal of 12535290661 is 16609253521.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10702937025 + 1832353636 = 103455^2 + 42806^2 .

It is a cyclic number.

It is not a de Polignac number, because 12535290661 - 2⁷ = 12535290533 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12535290667) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6267645330 + 6267645331.

It is an arithmetic number, because the mean of its divisors is an integer number (6267645331).

Almost surely, 2^12535290661 is an apocalyptic number.

It is an amenable number.

12535290661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12535290661 is an equidigital number, since it uses as much as digits as its factorization.

12535290661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 97200, while the sum is 40.

The spelling of 12535290661 in words is "twelve billion, five hundred thirty-five million, two hundred ninety thousand, six hundred sixty-one".