2166101615616 has 88 divisors (see below), whose sum is σ = 5775196842240. Its totient is φ = 721815478272.

The previous prime is 2166101615609. The next prime is 2166101615653. The reversal of 2166101615616 is 6165161016612.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10213890 + ... + 10423806.

Almost surely, 2^{2166101615616} 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 2166101615616, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (2887598421120).

2166101615616 is an abundant number, since it is smaller than the sum of its proper divisors (3609095226624).

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

2166101615616 is a wasteful number, since it uses less digits than its factorization.

2166101615616 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 213299 (or 213281 counting only the distinct ones).

The product of its (nonzero) digits is 77760, while the sum is 42.

The spelling of 2166101615616 in words is "two trillion, one hundred sixty-six billion, one hundred one million, six hundred fifteen thousand, six hundred sixteen".