2775256128 has 224 divisors, whose sum is σ = 8664854400. Its totient is φ = 868589568.

The previous prime is 2775256097. The next prime is 2775256193. The reversal of 2775256128 is 8216525772.

2775256128 is a `hidden beast` number, since 2 + 7 + 7 + 5 + 25 + 612 + 8 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 4497676 + ... + 4498292.

Almost surely, 2^2775256128 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775256128, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4332427200).

2775256128 is an abundant number, since it is smaller than the sum of its proper divisors (5889598272).

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

2775256128 is a wasteful number, since it uses less digits than its factorization.

2775256128 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 794 (or 778 counting only the distinct ones).

The product of its digits is 470400, while the sum is 45.

The square root of 2775256128 is about 52680.6997675619. The cubic root of 2775256128 is about 1405.2956116971.

The spelling of 2775256128 in words is "two billion, seven hundred seventy-five million, two hundred fifty-six thousand, one hundred twenty-eight".