2557679777828 has 24 divisors (see below), whose sum is σ = 5119727989824. Its totient is φ = 1095212383200.

The previous prime is 2557679777771. The next prime is 2557679777833. The reversal of 2557679777828 is 8287779767552.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38970503 + ... + 39036078.

It is an arithmetic number, because the mean of its divisors is an integer number (213321999576).

Almost surely, 2^{2557679777828} is an apocalyptic number.

2557679777828 is a gapful number since it is divisible by the number (28) formed by its first and last digit.

It is an amenable number.

2557679777828 is an abundant number, since it is smaller than the sum of its proper divisors (2562048211996).

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

2557679777828 is a wasteful number, since it uses less digits than its factorization.

2557679777828 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 78007763 (or 78007761 counting only the distinct ones).

The product of its digits is 5808499200, while the sum is 80.

The spelling of 2557679777828 in words is "two trillion, five hundred fifty-seven billion, six hundred seventy-nine million, seven hundred seventy-seven thousand, eight hundred twenty-eight".