12775562591 has 4 divisors (see below), whose sum is σ = 13936977384. Its totient is φ = 11614147800.

The previous prime is 12775562563. The next prime is 12775562599. The reversal of 12775562591 is 19526557721.

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 12775562591 - 2¹⁰ = 12775561567 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (12775562599) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 580707380 + ... + 580707401.

It is an arithmetic number, because the mean of its divisors is an integer number (3484244346).

Almost surely, 2^12775562591 is an apocalyptic number.

12775562591 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

12775562591 is a deficient number, since it is larger than the sum of its proper divisors (1161414793).

12775562591 is a wasteful number, since it uses less digits than its factorization.

12775562591 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1161414792.

The product of its digits is 1323000, while the sum is 50.

The spelling of 12775562591 in words is "twelve billion, seven hundred seventy-five million, five hundred sixty-two thousand, five hundred ninety-one".