11681516 has 96 divisors (see below), whose sum is σ = 28449792. Its totient is φ = 4055040.

The previous prime is 11681491. The next prime is 11681543. The reversal of 11681516 is 61518611.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 120380 + ... + 120476.

It is an arithmetic number, because the mean of its divisors is an integer number (296352).

Almost surely, 2^11681516 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 11681516, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14224896).

11681516 is an abundant number, since it is smaller than the sum of its proper divisors (16768276).

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

11681516 is a wasteful number, since it uses less digits than its factorization.

11681516 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159 (or 157 counting only the distinct ones).

The product of its digits is 1440, while the sum is 29.

The square root of 11681516 is about 3417.8232839045. The cubic root of 11681516 is about 226.8992547183.

The spelling of 11681516 in words is "eleven million, six hundred eighty-one thousand, five hundred sixteen".