2776055640 has 128 divisors (see below), whose sum is σ = 8420751360. Its totient is φ = 732109824.

The previous prime is 2776055617. The next prime is 2776055651. The reversal of 2776055640 is 465506772.

It is a junction number, because it is equal to n+sod(n) for n = 2776055592 and 2776055601.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6074292 + ... + 6074748.

It is an arithmetic number, because the mean of its divisors is an integer number (65787120).

Almost surely, 2^2776055640 is an apocalyptic number.

2776055640 is a gapful number since it is divisible by the number (20) 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 2776055640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (4210375680).

2776055640 is an abundant number, since it is smaller than the sum of its proper divisors (5644695720).

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

2776055640 is a wasteful number, since it uses less digits than its factorization.

2776055640 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 921 (or 917 counting only the distinct ones).

The product of its (nonzero) digits is 352800, while the sum is 42.

The square root of 2776055640 is about 52688.2875030115. The cubic root of 2776055640 is about 1405.4305473304.

The spelling of 2776055640 in words is "two billion, seven hundred seventy-six million, fifty-five thousand, six hundred forty".