2778975964 has 12 divisors (see below), whose sum is σ = 4976306104. Its totient is φ = 1357174224.

The previous prime is 2778975959. The next prime is 2778975971. The reversal of 2778975964 is 4695798772.

It is a junction number, because it is equal to n+sod(n) for n = 2778975896 and 2778975905.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8078247 + ... + 8078590.

Almost surely, 2^2778975964 is an apocalyptic number.

It is an amenable number.

2778975964 is a deficient number, since it is larger than the sum of its proper divisors (2197330140).

2778975964 is a wasteful number, since it uses less digits than its factorization.

2778975964 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16156884 (or 16156882 counting only the distinct ones).

The product of its digits is 53343360, while the sum is 64.

The square root of 2778975964 is about 52715.9934365274. The cubic root of 2778975964 is about 1405.9231976620.

The spelling of 2778975964 in words is "two billion, seven hundred seventy-eight million, nine hundred seventy-five thousand, nine hundred sixty-four".