11643264461 has 2 divisors, whose sum is σ = 11643264462. Its totient is φ = 11643264460.

The previous prime is 11643264449. The next prime is 11643264463. The reversal of 11643264461 is 16446234611.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 10654161961 + 989102500 = 103219^2 + 31450^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-11643264461 is a prime.

Together with 11643264463, 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 (11643264463) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 5821632230 + 5821632231.

It is an arithmetic number, because the mean of its divisors is an integer number (5821632231).

Almost surely, 2^11643264461 is an apocalyptic number.

It is an amenable number.

11643264461 is a deficient number, since it is larger than the sum of its proper divisors (1).

11643264461 is an equidigital number, since it uses as much as digits as its factorization.

11643264461 is an evil number, because the sum of its binary digits is even.

The product of its digits is 82944, while the sum is 38.

The spelling of 11643264461 in words is "eleven billion, six hundred forty-three million, two hundred sixty-four thousand, four hundred sixty-one".