2168730378612 has 96 divisors (see below), whose sum is σ = 6439807799040. Its totient is φ = 618293036160.

The previous prime is 2168730378593. The next prime is 2168730378623.

It is a happy number.

2168730378612 is a `hidden beast` number, since 2 + 16 + 8 + 7 + 3 + 0 + 3 + 7 + 8 + 612 = 666.

2168730378612 is nontrivially palindromic in base 10.

It is a super-2 number, since 2×2168730378612² (a number of 25 digits) contains 22 as substring.

It is a hoax number, since the sum of its digits (54) coincides with the sum of the digits of its distinct prime factors.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 2762863 + ... + 3459894.

It is an arithmetic number, because the mean of its divisors is an integer number (67081331240).

Almost surely, 2^{2168730378612} is an apocalyptic number.

It is an amenable number.

2168730378612 is an abundant number, since it is smaller than the sum of its proper divisors (4271077420428).

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

2168730378612 is a wasteful number, since it uses less digits than its factorization.

2168730378612 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6223238 (or 6223230 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 2168730378612 in words is "two trillion, one hundred sixty-eight billion, seven hundred thirty million, three hundred seventy-eight thousand, six hundred twelve".