1264561475663 has 2 divisors, whose sum is σ = 1264561475664. Its totient is φ = 1264561475662.

The previous prime is 1264561475627. The next prime is 1264561475707. The reversal of 1264561475663 is 3665741654621.

It is a weak prime.

It is an emirp because it is prime and its reverse (3665741654621) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 1264561475663 - 2¹² = 1264561471567 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 1264561475599 and 1264561475608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1264561075663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 632280737831 + 632280737832.

It is an arithmetic number, because the mean of its divisors is an integer number (632280737832).

Almost surely, 2^{1264561475663} is an apocalyptic number.

1264561475663 is a deficient number, since it is larger than the sum of its proper divisors (1).

1264561475663 is an equidigital number, since it uses as much as digits as its factorization.

1264561475663 is an evil number, because the sum of its binary digits is even.

The product of its digits is 21772800, while the sum is 56.

The spelling of 1264561475663 in words is "one trillion, two hundred sixty-four billion, five hundred sixty-one million, four hundred seventy-five thousand, six hundred sixty-three".