2771265978 has 48 divisors (see below), whose sum is σ = 6616690080. Its totient is φ = 832864032.

The previous prime is 2771265943. The next prime is 2771265983. The reversal of 2771265978 is 8795621772.

It is a happy number.

2771265978 is a `hidden beast` number, since 27 + 7 + 1 + 26 + 597 + 8 = 666.

2771265978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 127648 + ... + 147771.

It is an arithmetic number, because the mean of its divisors is an integer number (137847710).

Almost surely, 2^2771265978 is an apocalyptic number.

2771265978 is an abundant number, since it is smaller than the sum of its proper divisors (3845424102).

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

2771265978 is a wasteful number, since it uses less digits than its factorization.

2771265978 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 275483 (or 275480 counting only the distinct ones).

The product of its digits is 2963520, while the sum is 54.

The square root of 2771265978 is about 52642.8150653059. The cubic root of 2771265978 is about 1404.6217964395.

The spelling of 2771265978 in words is "two billion, seven hundred seventy-one million, two hundred sixty-five thousand, nine hundred seventy-eight".