11587218623 has 4 divisors (see below), whose sum is σ = 11604184488. Its totient is φ = 11570252760.

The previous prime is 11587218619. The next prime is 11587218631. The reversal of 11587218623 is 32681278511.

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 11587218623 - 2² = 11587218619 is a prime.

It is a super-2 number, since 2×11587218623² (a number of 21 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11587218613) 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, 8481908 + ... + 8483273.

It is an arithmetic number, because the mean of its divisors is an integer number (2901046122).

Almost surely, 2^11587218623 is an apocalyptic number.

11587218623 is a deficient number, since it is larger than the sum of its proper divisors (16965865).

11587218623 is an equidigital number, since it uses as much as digits as its factorization.

11587218623 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16965864.

The product of its digits is 161280, while the sum is 44.

The spelling of 11587218623 in words is "eleven billion, five hundred eighty-seven million, two hundred eighteen thousand, six hundred twenty-three".