2777780555556 has 48 divisors (see below), whose sum is σ = 6619626289920. Its totient is φ = 906194200320.

The previous prime is 2777780555549. The next prime is 2777780555567. The reversal of 2777780555556 is 6555550877772.

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 15 ways as a sum of consecutive naturals, for example, 19930560 + ... + 20069448.

It is an arithmetic number, because the mean of its divisors is an integer number (137908881040).

Almost surely, 2^{2777780555556} is an apocalyptic number.

It is a pronic number, being equal to 1666667×1666668.

It is an amenable number.

2777780555556 is an abundant number, since it is smaller than the sum of its proper divisors (3841845734364).

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

2777780555556 is a wasteful number, since it uses less digits than its factorization.

2777780555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 174404 (or 174402 counting only the distinct ones).

The product of its (nonzero) digits is 720300000, while the sum is 69.

The spelling of 2777780555556 in words is "two trillion, seven hundred seventy-seven billion, seven hundred eighty million, five hundred fifty-five thousand, five hundred fifty-six".