11531116442 has 8 divisors (see below), whose sum is σ = 17384475636. Its totient is φ = 5736291232.

The previous prime is 11531116423. The next prime is 11531116459. The reversal of 11531116442 is 24461113511.

It can be written as a sum of positive squares in 2 ways, for example, as 10064303041 + 1466813401 = 100321^2 + 38299^2 .

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

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 14633003 + ... + 14633790.

Almost surely, 2^11531116442 is an apocalyptic number.

11531116442 is a deficient number, since it is larger than the sum of its proper divisors (5853359194).

11531116442 is a wasteful number, since it uses less digits than its factorization.

11531116442 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29266992.

The product of its digits is 2880, while the sum is 29.

Adding to 11531116442 its reverse (24461113511), we get a palindrome (35992229953).

The spelling of 11531116442 in words is "eleven billion, five hundred thirty-one million, one hundred sixteen thousand, four hundred forty-two".