2556556784 has 10 divisors (see below), whose sum is σ = 4953328800. Its totient is φ = 1278278384.

The previous prime is 2556556771. The next prime is 2556556801. The reversal of 2556556784 is 4876556552.

2556556784 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 79892384 + ... + 79892415.

It is an arithmetic number, because the mean of its divisors is an integer number (495332880).

Almost surely, 2^2556556784 is an apocalyptic number.

It is an amenable number.

2556556784 is a deficient number, since it is larger than the sum of its proper divisors (2396772016).

2556556784 is a wasteful number, since it uses less digits than its factorization.

2556556784 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 159784807 (or 159784801 counting only the distinct ones).

The product of its digits is 10080000, while the sum is 53.

The square root of 2556556784 is about 50562.4048478709. The cubic root of 2556556784 is about 1367.3671679424.

The spelling of 2556556784 in words is "two billion, five hundred fifty-six million, five hundred fifty-six thousand, seven hundred eighty-four".