2178263067872 has 24 divisors (see below), whose sum is σ = 4289577407136. Its totient is φ = 1088846583552.

The previous prime is 2178263067853. The next prime is 2178263067901. The reversal of 2178263067872 is 2787603628712.

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, 8780453 + ... + 9025124.

It is an arithmetic number, because the mean of its divisors is an integer number (178732391964).

Almost surely, 2^{2178263067872} is an apocalyptic number.

It is an amenable number.

2178263067872 is a deficient number, since it is larger than the sum of its proper divisors (2111314339264).

2178263067872 is a wasteful number, since it uses less digits than its factorization.

2178263067872 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17809410 (or 17809402 counting only the distinct ones).

The product of its (nonzero) digits is 18966528, while the sum is 59.

The spelling of 2178263067872 in words is "two trillion, one hundred seventy-eight billion, two hundred sixty-three million, sixty-seven thousand, eight hundred seventy-two".