2108616778 has 8 divisors (see below), whose sum is σ = 3180595680. Its totient is φ = 1048418220.

The previous prime is 2108616773. The next prime is 2108616781. The reversal of 2108616778 is 8776168012.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not an unprimeable number, because it can be changed into a prime (2108616773) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2944638 + ... + 2945353.

It is an arithmetic number, because the mean of its divisors is an integer number (397574460).

Almost surely, 2^2108616778 is an apocalyptic number.

2108616778 is a deficient number, since it is larger than the sum of its proper divisors (1071978902).

2108616778 is a wasteful number, since it uses less digits than its factorization.

2108616778 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5890172.

The product of its (nonzero) digits is 225792, while the sum is 46.

The square root of 2108616778 is about 45919.6774596686. The cubic root of 2108616778 is about 1282.3282774283.

The spelling of 2108616778 in words is "two billion, one hundred eight million, six hundred sixteen thousand, seven hundred seventy-eight".