2780874755 has 16 divisors (see below), whose sum is σ = 3417163200. Its totient is φ = 2171714688.

The previous prime is 2780874737. The next prime is 2780874781. The reversal of 2780874755 is 5574780872.

It is a Cunningham number, because it is equal to 52734²-1.

It is a cyclic number.

It is not a de Polignac number, because 2780874755 - 2¹⁶ = 2780809219 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (53).

It is a junction number, because it is equal to n+sod(n) for n = 2780874697 and 2780874706.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 26369 + ... + 79101.

It is an arithmetic number, because the mean of its divisors is an integer number (213572700).

Almost surely, 2^2780874755 is an apocalyptic number.

2780874755 is a deficient number, since it is larger than the sum of its proper divisors (636288445).

2780874755 is a wasteful number, since it uses less digits than its factorization.

2780874755 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 52990.

The product of its (nonzero) digits is 4390400, while the sum is 53.

The square root of 2780874755 is about 52733.9999905185. Note that the first 5 decimals coincide. The cubic root of 2780874755 is about 1406.2433331569.

The spelling of 2780874755 in words is "two billion, seven hundred eighty million, eight hundred seventy-four thousand, seven hundred fifty-five".