1264661113559 has 4 divisors (see below), whose sum is σ = 1267236798600. Its totient is φ = 1262085428520.

The previous prime is 1264661113543. The next prime is 1264661113571. The reversal of 1264661113559 is 9553111664621.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 1264661113559 - 2⁴ = 1264661113543 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1264661118559) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1287841784 + ... + 1287842765.

It is an arithmetic number, because the mean of its divisors is an integer number (316809199650).

Almost surely, 2^{1264661113559} is an apocalyptic number.

1264661113559 is a deficient number, since it is larger than the sum of its proper divisors (2575685041).

1264661113559 is an equidigital number, since it uses as much as digits as its factorization.

1264661113559 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2575685040.

The product of its digits is 1166400, while the sum is 50.

The spelling of 1264661113559 in words is "one trillion, two hundred sixty-four billion, six hundred sixty-one million, one hundred thirteen thousand, five hundred fifty-nine".