27260591789 has 4 divisors (see below), whose sum is σ = 27262711260. Its totient is φ = 27258472320.

The previous prime is 27260591741. The next prime is 27260591819. The reversal of 27260591789 is 98719506272.

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

It can be written as a sum of positive squares in 2 ways, for example, as 10929029764 + 16331562025 = 104542^2 + 127795^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27260591789 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 (27260591719) 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, 1040324 + ... + 1066205.

It is an arithmetic number, because the mean of its divisors is an integer number (6815677815).

Almost surely, 2^27260591789 is an apocalyptic number.

It is an amenable number.

27260591789 is a deficient number, since it is larger than the sum of its proper divisors (2119471).

27260591789 is a wasteful number, since it uses less digits than its factorization.

27260591789 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2119470.

The product of its (nonzero) digits is 3810240, while the sum is 56.

The spelling of 27260591789 in words is "twenty-seven billion, two hundred sixty million, five hundred ninety-one thousand, seven hundred eighty-nine".