12635569433 has 2 divisors, whose sum is σ = 12635569434. Its totient is φ = 12635569432.

The previous prime is 12635569423. The next prime is 12635569451. The reversal of 12635569433 is 33496553621.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 11878384144 + 757185289 = 108988^2 + 27517^2 .

It is a cyclic number.

It is not a de Polignac number, because 12635569433 - 2⁶ = 12635569369 is a prime.

It is a super-2 number, since 2×12635569433² (a number of 21 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (12635569423) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6317784716 + 6317784717.

It is an arithmetic number, because the mean of its divisors is an integer number (6317784717).

Almost surely, 2^12635569433 is an apocalyptic number.

It is an amenable number.

12635569433 is a deficient number, since it is larger than the sum of its proper divisors (1).

12635569433 is an equidigital number, since it uses as much as digits as its factorization.

12635569433 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1749600, while the sum is 47.

The spelling of 12635569433 in words is "twelve billion, six hundred thirty-five million, five hundred sixty-nine thousand, four hundred thirty-three".