2775770816 has 84 divisors (see below), whose sum is σ = 6900446448. Its totient is φ = 1098091008.

The previous prime is 2775770813. The next prime is 2775770827. The reversal of 2775770816 is 6180775772.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (2775770813) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 6725 + ... + 74811.

It is an arithmetic number, because the mean of its divisors is an integer number (82148172).

Almost surely, 2^2775770816 is an apocalyptic number.

2775770816 is a gapful number since it is divisible by the number (26) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775770816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3450223224).

2775770816 is an abundant number, since it is smaller than the sum of its proper divisors (4124675632).

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

2775770816 is a wasteful number, since it uses less digits than its factorization.

2775770816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 68126 (or 68109 counting only the distinct ones).

The product of its (nonzero) digits is 1152480, while the sum is 50.

The square root of 2775770816 is about 52685.5845179685. The cubic root of 2775770816 is about 1405.3824798450.

The spelling of 2775770816 in words is "two billion, seven hundred seventy-five million, seven hundred seventy thousand, eight hundred sixteen".