11916631586 has 8 divisors (see below), whose sum is σ = 17876511660. Its totient is φ = 5957794368.

The previous prime is 11916631583. The next prime is 11916631589. The reversal of 11916631586 is 68513661911.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (11916631583) and next prime (11916631589).

It can be written as a sum of positive squares in 2 ways, for example, as 7879935361 + 4036696225 = 88769^2 + 63535^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×11916631586² (a number of 21 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 11916631586.

It is not an unprimeable number, because it can be changed into a prime (11916631583) 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, 231491 + ... + 278246.

Almost surely, 2^11916631586 is an apocalyptic number.

11916631586 is a deficient number, since it is larger than the sum of its proper divisors (5959880074).

11916631586 is a wasteful number, since it uses less digits than its factorization.

11916631586 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 521428.

The product of its digits is 233280, while the sum is 47.

The spelling of 11916631586 in words is "eleven billion, nine hundred sixteen million, six hundred thirty-one thousand, five hundred eighty-six".