2567778243 has 16 divisors (see below), whose sum is σ = 3627066240. Its totient is φ = 1610280576.

The previous prime is 2567778203. The next prime is 2567778253. The reversal of 2567778243 is 3428777652.

2567778243 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 2567778243 - 2¹² = 2567774147 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (51).

It is not an unprimeable number, because it can be changed into a prime (2567778203) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 88668 + ... + 114006.

It is an arithmetic number, because the mean of its divisors is an integer number (226691640).

Almost surely, 2^2567778243 is an apocalyptic number.

2567778243 is a deficient number, since it is larger than the sum of its proper divisors (1059287997).

2567778243 is a wasteful number, since it uses less digits than its factorization.

2567778243 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27346.

The product of its digits is 3951360, while the sum is 51.

The square root of 2567778243 is about 50673.2497773727. The cubic root of 2567778243 is about 1369.3648365475.

The spelling of 2567778243 in words is "two billion, five hundred sixty-seven million, seven hundred seventy-eight thousand, two hundred forty-three".