2113661665416 has 64 divisors (see below), whose sum is σ = 6042368839680. Its totient is φ = 603569782080.

The previous prime is 2113661665411. The next prime is 2113661665433. The reversal of 2113661665416 is 6145661663112.

It is not an unprimeable number, because it can be changed into a prime (2113661665411) by changing a digit.

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 in 15 ways as a sum of consecutive naturals, for example, 3169336 + ... + 3777831.

It is an arithmetic number, because the mean of its divisors is an integer number (94412013120).

Almost surely, 2^{2113661665416} is an apocalyptic number.

It is an amenable number.

2113661665416 is an abundant number, since it is smaller than the sum of its proper divisors (3928707174264).

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

2113661665416 is a wasteful number, since it uses less digits than its factorization.

2113661665416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6948994 (or 6948990 counting only the distinct ones).

The product of its digits is 933120, while the sum is 48.

The spelling of 2113661665416 in words is "two trillion, one hundred thirteen billion, six hundred sixty-one million, six hundred sixty-five thousand, four hundred sixteen".