2778018136 has 32 divisors (see below), whose sum is σ = 5290440480. Its totient is φ = 1367296000.

The previous prime is 2778018107. The next prime is 2778018157. The reversal of 2778018136 is 6318108772.

It is a junction number, because it is equal to n+sod(n) for n = 2778018092 and 2778018101.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 394680 + ... + 401656.

It is an arithmetic number, because the mean of its divisors is an integer number (165326265).

Almost surely, 2^2778018136 is an apocalyptic number.

It is an amenable number.

2778018136 is a deficient number, since it is larger than the sum of its proper divisors (2512422344).

2778018136 is a wasteful number, since it uses less digits than its factorization.

2778018136 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7755 (or 7751 counting only the distinct ones).

The product of its (nonzero) digits is 112896, while the sum is 43.

The square root of 2778018136 is about 52706.9078584582. The cubic root of 2778018136 is about 1405.7616528621.

The spelling of 2778018136 in words is "two billion, seven hundred seventy-eight million, eighteen thousand, one hundred thirty-six".