2166525144240 has 80 divisors (see below), whose sum is σ = 6872419327488. Its totient is φ = 564304220928.

The previous prime is 2166525144229. The next prime is 2166525144253. The reversal of 2166525144240 is 424415256612.

It is a tau number, because it is divible by the number of its divisors (80).

It is a junction number, because it is equal to n+sod(n) for n = 2166525144192 and 2166525144201.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 104956984 + ... + 104977623.

Almost surely, 2^{2166525144240} is an apocalyptic number.

2166525144240 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2166525144240 is an abundant number, since it is smaller than the sum of its proper divisors (4705894183248).

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

2166525144240 is a wasteful number, since it uses less digits than its factorization.

2166525144240 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 209934666 (or 209934660 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 42.

The spelling of 2166525144240 in words is "two trillion, one hundred sixty-six billion, five hundred twenty-five million, one hundred forty-four thousand, two hundred forty".