2778233565 has 8 divisors (see below), whose sum is σ = 4445173728. Its totient is φ = 1481724560.

The previous prime is 2778233539. The next prime is 2778233567. The reversal of 2778233565 is 5653328772.

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

It is not a de Polignac number, because 2778233565 - 2⁵ = 2778233533 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2778233567) 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, 92607771 + ... + 92607800.

It is an arithmetic number, because the mean of its divisors is an integer number (555646716).

Almost surely, 2^2778233565 is an apocalyptic number.

It is an amenable number.

2778233565 is a deficient number, since it is larger than the sum of its proper divisors (1666940163).

2778233565 is a wasteful number, since it uses less digits than its factorization.

2778233565 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 185215579.

The product of its digits is 2116800, while the sum is 48.

The square root of 2778233565 is about 52708.9514693662. The cubic root of 2778233565 is about 1405.7979897978.

The spelling of 2778233565 in words is "two billion, seven hundred seventy-eight million, two hundred thirty-three thousand, five hundred sixty-five".