2556828773 has 8 divisors (see below), whose sum is σ = 2571800088. Its totient is φ = 2541901824.

The previous prime is 2556828763. The next prime is 2556828823. The reversal of 2556828773 is 3778286552.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 717409 + 2556111364 = 847^2 + 50558^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 2556828773 - 2⁶ = 2556828709 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2556828733) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 108215 + ... + 129707.

It is an arithmetic number, because the mean of its divisors is an integer number (321475011).

Almost surely, 2^2556828773 is an apocalyptic number.

It is an amenable number.

2556828773 is a deficient number, since it is larger than the sum of its proper divisors (14971315).

2556828773 is a wasteful number, since it uses less digits than its factorization.

2556828773 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 22183.

The product of its digits is 5644800, while the sum is 53.

The square root of 2556828773 is about 50565.0944130435. The cubic root of 2556828773 is about 1367.4156570721.

The spelling of 2556828773 in words is "two billion, five hundred fifty-six million, eight hundred twenty-eight thousand, seven hundred seventy-three".