2778116617 has 8 divisors (see below), whose sum is σ = 2906562240. Its totient is φ = 2650309200.

The previous prime is 2778116587. The next prime is 2778116629. The reversal of 2778116617 is 7166118772.

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

It is a cyclic number.

It is not a de Polignac number, because 2778116617 - 2¹⁹ = 2777592329 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (2778116647) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 150634 + ... + 168067.

It is an arithmetic number, because the mean of its divisors is an integer number (363320280).

Almost surely, 2^2778116617 is an apocalyptic number.

It is an amenable number.

2778116617 is a deficient number, since it is larger than the sum of its proper divisors (128445623).

2778116617 is a wasteful number, since it uses less digits than its factorization.

2778116617 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 319103.

The product of its digits is 197568, while the sum is 46.

The square root of 2778116617 is about 52707.8420825592. The cubic root of 2778116617 is about 1405.7782641260.

The spelling of 2778116617 in words is "two billion, seven hundred seventy-eight million, one hundred sixteen thousand, six hundred seventeen".