111651165516 has 96 divisors (see below), whose sum is σ = 293414768640. Its totient is φ = 32746636800.

The previous prime is 111651165497. The next prime is 111651165599. The reversal of 111651165516 is 615561156111.

It is a super-2 number, since 2×111651165516² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 873000 + ... + 992688.

It is an arithmetic number, because the mean of its divisors is an integer number (3056403840).

Almost surely, 2^111651165516 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 111651165516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (146707384320).

111651165516 is an abundant number, since it is smaller than the sum of its proper divisors (181763603124).

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

111651165516 is a wasteful number, since it uses less digits than its factorization.

111651165516 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 119935 (or 119933 counting only the distinct ones).

The product of its digits is 27000, while the sum is 39.

The spelling of 111651165516 in words is "one hundred eleven billion, six hundred fifty-one million, one hundred sixty-five thousand, five hundred sixteen".