2777775555556 has 27 divisors (see below), whose sum is σ = 4887811582563. Its totient is φ = 1381299447480.

The previous prime is 2777775555539. The next prime is 2777775555557. The reversal of 2777775555556 is 6555555777772.

The square root of 2777775555556 is 1666666.

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

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2777775555557) by changing a digit.

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 8 ways as a sum of consecutive naturals, for example, 636664231 + ... + 636668593.

Almost surely, 2^{2777775555556} is an apocalyptic number.

2777775555556 is the 1666666-th square number.

It is an amenable number.

2777775555556 is a deficient number, since it is larger than the sum of its proper divisors (2110036027007).

2777775555556 is an frugal number, since it uses more digits than its factorization.

2777775555556 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9112 (or 4556 counting only the distinct ones).

The product of its digits is 3151312500, while the sum is 73.

The spelling of 2777775555556 in words is "two trillion, seven hundred seventy-seven billion, seven hundred seventy-five million, five hundred fifty-five thousand, five hundred fifty-six".