2782556321868 has 36 divisors (see below), whose sum is σ = 7033906811568. Its totient is φ = 927489396960.

The previous prime is 2782556321861. The next prime is 2782556321887. The reversal of 2782556321868 is 8681236552872.

2782556321868 is a `hidden beast` number, since 2 + 7 + 8 + 2 + 5 + 563 + 2 + 1 + 8 + 68 = 666.

It is a tau number, because it is divible by the number of its divisors (36).

It is not an unprimeable number, because it can be changed into a prime (2782556321861) by changing a digit.

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 11 ways as a sum of consecutive naturals, for example, 56371 + ... + 2359722.

Almost surely, 2^{2782556321868} is an apocalyptic number.

It is an amenable number.

2782556321868 is an abundant number, since it is smaller than the sum of its proper divisors (4251350489700).

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

2782556321868 is a wasteful number, since it uses less digits than its factorization.

2782556321868 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2448094 (or 2448089 counting only the distinct ones).

The product of its digits is 77414400, while the sum is 63.

The spelling of 2782556321868 in words is "two trillion, seven hundred eighty-two billion, five hundred fifty-six million, three hundred twenty-one thousand, eight hundred sixty-eight".