2778744782940 has 96 divisors (see below), whose sum is σ = 8928879826944. Its totient is φ = 632506199040.

The previous prime is 2778744782929. The next prime is 2778744783011. The reversal of 2778744782940 is 492874478772.

It is a congruent number.

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 31 ways as a sum of consecutive naturals, for example, 13625044 + ... + 13827483.

It is an arithmetic number, because the mean of its divisors is an integer number (93009164864).

Almost surely, 2^{2778744782940} is an apocalyptic number.

2778744782940 is a gapful number since it is divisible by the number (20) formed by its first and last digit.

It is an amenable number.

2778744782940 is an abundant number, since it is smaller than the sum of its proper divisors (6150135044004).

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

2778744782940 is a wasteful number, since it uses less digits than its factorization.

2778744782940 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 27452787 (or 27452785 counting only the distinct ones).

The product of its (nonzero) digits is 354041856, while the sum is 69.

The spelling of 2778744782940 in words is "two trillion, seven hundred seventy-eight billion, seven hundred forty-four million, seven hundred eighty-two thousand, nine hundred forty".