12735222253661 has 2 divisors, whose sum is σ = 12735222253662. Its totient is φ = 12735222253660.

The previous prime is 12735222253627. The next prime is 12735222253723. The reversal of 12735222253661 is 16635222253721.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 10154540651161 + 2580681602500 = 3186619^2 + 1606450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-12735222253661 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12735222253261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6367611126830 + 6367611126831.

It is an arithmetic number, because the mean of its divisors is an integer number (6367611126831).

Almost surely, 2^{12735222253661} is an apocalyptic number.

It is an amenable number.

12735222253661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12735222253661 is an equidigital number, since it uses as much as digits as its factorization.

12735222253661 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1814400, while the sum is 47.

The spelling of 12735222253661 in words is "twelve trillion, seven hundred thirty-five billion, two hundred twenty-two million, two hundred fifty-three thousand, six hundred sixty-one".