11521661567016 has 64 divisors (see below), whose sum is σ = 29957108601600. Its totient is φ = 3689454382848.

The previous prime is 11521661566927. The next prime is 11521661567023. The reversal of 11521661567016 is 61076516612511.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 82049115 + ... + 82189418.

It is an arithmetic number, because the mean of its divisors is an integer number (468079821900).

Almost surely, 2^{11521661567016} is an apocalyptic number.

It is an amenable number.

11521661567016 is an abundant number, since it is smaller than the sum of its proper divisors (18435447034584).

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

11521661567016 is a wasteful number, since it uses less digits than its factorization.

11521661567016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 164238658 (or 164238654 counting only the distinct ones).

The product of its (nonzero) digits is 453600, while the sum is 48.

The spelling of 11521661567016 in words is "eleven trillion, five hundred twenty-one billion, six hundred sixty-one million, five hundred sixty-seven thousand, sixteen".