2178239484996 has 27 divisors (see below), whose sum is σ = 5506127749213. Its totient is φ = 726076876560.

The previous prime is 2178239484989. The next prime is 2178239485001. The reversal of 2178239484996 is 6994849328712.

The square root of 2178239484996 is 1475886.

It is a perfect power (a square), and thus also a powerful number.

2178239484996 is a `hidden beast` number, since 2 + 1 + 78 + 2 + 394 + 84 + 9 + 96 = 666.

It can be written as a sum of positive squares in only one way, i.e., 2008132731396 + 170106753600 = 1417086^2 + 412440^2 .

It is a Duffinian number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 8732326 + ... + 8978306.

Almost surely, 2^{2178239484996} is an apocalyptic number.

2178239484996 is the 1475886-th square number.

It is an amenable number.

2178239484996 is an abundant number, since it is smaller than the sum of its proper divisors (3327888264217).

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

2178239484996 is an frugal number, since it uses more digits than its factorization.

2178239484996 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 491972 (or 245986 counting only the distinct ones).

The product of its digits is 376233984, while the sum is 72.

The spelling of 2178239484996 in words is "two trillion, one hundred seventy-eight billion, two hundred thirty-nine million, four hundred eighty-four thousand, nine hundred ninety-six".