2775540378 has 64 divisors (see below), whose sum is σ = 6099432192. Its totient is φ = 836828160.

The previous prime is 2775540359. The next prime is 2775540389. The reversal of 2775540378 is 8730455772.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 956626 + ... + 959522.

It is an arithmetic number, because the mean of its divisors is an integer number (95303628).

Almost surely, 2^2775540378 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 2775540378, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (3049716096).

2775540378 is an abundant number, since it is smaller than the sum of its proper divisors (3323891814).

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

2775540378 is a wasteful number, since it uses less digits than its factorization.

2775540378 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3159.

The product of its (nonzero) digits is 1646400, while the sum is 48.

The square root of 2775540378 is about 52683.3975555867. The cubic root of 2775540378 is about 1405.3435882468.

The spelling of 2775540378 in words is "two billion, seven hundred seventy-five million, five hundred forty thousand, three hundred seventy-eight".