2166610515984 has 60 divisors (see below), whose sum is σ = 6098549468076. Its totient is φ = 718028910336.

The previous prime is 2166610515947. The next prime is 2166610516027. The reversal of 2166610515984 is 4895150166612.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 2078579625984 + 88030890000 = 1441728^2 + 296700^2 .

It is a super-2 number, since 2×2166610515984² (a number of 25 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 2166610515984.

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 11 ways as a sum of consecutive naturals, for example, 43460367 + ... + 43510190.

Almost surely, 2^{2166610515984} is an apocalyptic number.

2166610515984 is a gapful number since it is divisible by the number (24) formed by its first and last digit.

It is an amenable number.

2166610515984 is an abundant number, since it is smaller than the sum of its proper divisors (3931938952092).

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

2166610515984 is a wasteful number, since it uses less digits than its factorization.

2166610515984 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 86970744 (or 86970735 counting only the distinct ones).

The product of its (nonzero) digits is 3110400, while the sum is 54.

The spelling of 2166610515984 in words is "two trillion, one hundred sixty-six billion, six hundred ten million, five hundred fifteen thousand, nine hundred eighty-four".