11521616 has 10 divisors (see below), whose sum is σ = 22323162. Its totient is φ = 5760800.

The previous prime is 11521607. The next prime is 11521633. The reversal of 11521616 is 61612511.

It can be written as a sum of positive squares in only one way, i.e., 6250000 + 5271616 = 2500^2 + 2296^2 .

11521616 is a modest number, since divided by 1616 gives 1152 as remainder.

It is a junction number, because it is equal to n+sod(n) for n = 11521591 and 11521600.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 360035 + ... + 360066.

Almost surely, 2^11521616 is an apocalyptic number.

11521616 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

11521616 is a deficient number, since it is larger than the sum of its proper divisors (10801546).

11521616 is an equidigital number, since it uses as much as digits as its factorization.

11521616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 720109 (or 720103 counting only the distinct ones).

The product of its digits is 360, while the sum is 23.

The square root of 11521616 is about 3394.3506006304. The cubic root of 11521616 is about 225.8592069531.

The spelling of 11521616 in words is "eleven million, five hundred twenty-one thousand, six hundred sixteen".