2178506921368 has 16 divisors (see below), whose sum is σ = 4084914925080. Its totient is φ = 1089196274688.

The previous prime is 2178506921351. The next prime is 2178506921387. The reversal of 2178506921368 is 8631296058712.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 6986130 + ... + 7291297.

Almost surely, 2^{2178506921368} is an apocalyptic number.

It is an amenable number.

2178506921368 is a deficient number, since it is larger than the sum of its proper divisors (1906408003712).

2178506921368 is a wasteful number, since it uses less digits than its factorization.

2178506921368 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 14296506 (or 14296502 counting only the distinct ones).

The product of its (nonzero) digits is 8709120, while the sum is 58.

The spelling of 2178506921368 in words is "two trillion, one hundred seventy-eight billion, five hundred six million, nine hundred twenty-one thousand, three hundred sixty-eight".