11115643551516 has 192 divisors, whose sum is σ = 33338941440000. Its totient is φ = 3137199595200.

The previous prime is 11115643551497. The next prime is 11115643551521. The reversal of 11115643551516 is 61515534651111.

It is a happy number.

11115643551516 is a `hidden beast` number, since 1 + 1 + 1 + 1 + 5 + 6 + 43 + 551 + 51 + 6 = 666.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 20645941 + ... + 21177491.

It is an arithmetic number, because the mean of its divisors is an integer number (173640320000).

Almost surely, 2^{11115643551516} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 11115643551516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (16669470720000).

11115643551516 is an abundant number, since it is smaller than the sum of its proper divisors (22223297888484).

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

11115643551516 is a wasteful number, since it uses less digits than its factorization.

11115643551516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531909 (or 531901 counting only the distinct ones).

The product of its digits is 270000, while the sum is 45.

The spelling of 11115643551516 in words is "eleven trillion, one hundred fifteen billion, six hundred forty-three million, five hundred fifty-one thousand, five hundred sixteen".