11587230691 has 4 divisors (see below), whose sum is σ = 11986790400. Its totient is φ = 11187670984.

The previous prime is 11587230679. The next prime is 11587230751. The reversal of 11587230691 is 19603278511.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 19603278511 = 23 ⋅852316457.

It is a cyclic number.

It is not a de Polignac number, because 11587230691 - 2⁷ = 11587230563 is a prime.

It is not an unprimeable number, because it can be changed into a prime (11587230631) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 199779811 + ... + 199779868.

It is an arithmetic number, because the mean of its divisors is an integer number (2996697600).

Almost surely, 2^11587230691 is an apocalyptic number.

11587230691 is a deficient number, since it is larger than the sum of its proper divisors (399559709).

11587230691 is an equidigital number, since it uses as much as digits as its factorization.

11587230691 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 399559708.

The product of its (nonzero) digits is 90720, while the sum is 43.

The spelling of 11587230691 in words is "eleven billion, five hundred eighty-seven million, two hundred thirty thousand, six hundred ninety-one".