2783781278316 has 48 divisors (see below), whose sum is σ = 7232665265280. Its totient is φ = 925940080080.

The previous prime is 2783781278303. The next prime is 2783781278389. The reversal of 2783781278316 is 6138721873872.

2783781278316 is a `hidden beast` number, since 278 + 3 + 7 + 81 + 278 + 3 + 16 = 666.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 27546730 + ... + 27647601.

It is an arithmetic number, because the mean of its divisors is an integer number (150680526360).

Almost surely, 2^{2783781278316} is an apocalyptic number.

It is an amenable number.

2783781278316 is an abundant number, since it is smaller than the sum of its proper divisors (4448883986964).

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

2783781278316 is a wasteful number, since it uses less digits than its factorization.

2783781278316 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 55194811 (or 55194803 counting only the distinct ones).

The product of its digits is 37933056, while the sum is 63.

The spelling of 2783781278316 in words is "two trillion, seven hundred eighty-three billion, seven hundred eighty-one million, two hundred seventy-eight thousand, three hundred sixteen".