13111152816 has 80 divisors (see below), whose sum is σ = 34639532928. Its totient is φ = 4272153600.

The previous prime is 13111152779. The next prime is 13111152823. The reversal of 13111152816 is 61825111131.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405736 + ... + 436856.

Almost surely, 2^13111152816 is an apocalyptic number.

13111152816 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 13111152816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (17319766464).

13111152816 is an abundant number, since it is smaller than the sum of its proper divisors (21528380112).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

13111152816 is a wasteful number, since it uses less digits than its factorization.

13111152816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 31330 (or 31324 counting only the distinct ones).

The product of its digits is 1440, while the sum is 30.

Adding to 13111152816 its reverse (61825111131), we get a palindrome (74936263947).

The spelling of 13111152816 in words is "thirteen billion, one hundred eleven million, one hundred fifty-two thousand, eight hundred sixteen".