11916631582 has 4 divisors (see below), whose sum is σ = 17874947376. Its totient is φ = 5958315790.

The previous prime is 11916631561. The next prime is 11916631583. The reversal of 11916631582 is 28513661911.

11916631582 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a super-2 number, since 2×11916631582² (a number of 21 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (11916631583) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2979157894 + ... + 2979157897.

It is an arithmetic number, because the mean of its divisors is an integer number (4468736844).

Almost surely, 2^11916631582 is an apocalyptic number.

11916631582 is a deficient number, since it is larger than the sum of its proper divisors (5958315794).

11916631582 is an equidigital number, since it uses as much as digits as its factorization.

11916631582 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5958315793.

The product of its digits is 77760, while the sum is 43.

The spelling of 11916631582 in words is "eleven billion, nine hundred sixteen million, six hundred thirty-one thousand, five hundred eighty-two".