12435367661 has 2 divisors, whose sum is σ = 12435367662. Its totient is φ = 12435367660.

The previous prime is 12435367619. The next prime is 12435367663. The reversal of 12435367661 is 16676353421.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 11754679561 + 680688100 = 108419^2 + 26090^2 .

It is a cyclic number.

It is not a de Polignac number, because 12435367661 - 2⁶ = 12435367597 is a prime.

It is a super-2 number, since 2×12435367661² (a number of 21 digits) contains 22 as substring.

Together with 12435367663, it forms a pair of twin primes.

It is a Chen prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (12435367663) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6217683830 + 6217683831.

It is an arithmetic number, because the mean of its divisors is an integer number (6217683831).

Almost surely, 2^12435367661 is an apocalyptic number.

It is an amenable number.

12435367661 is a deficient number, since it is larger than the sum of its proper divisors (1).

12435367661 is an equidigital number, since it uses as much as digits as its factorization.

12435367661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 544320, while the sum is 44.

The spelling of 12435367661 in words is "twelve billion, four hundred thirty-five million, three hundred sixty-seven thousand, six hundred sixty-one".