2268406557 has 12 divisors (see below), whose sum is σ = 3279847740. Its totient is φ = 1510766208.

The previous prime is 2268406537. The next prime is 2268406583. The reversal of 2268406557 is 7556048622.

It can be written as a sum of positive squares in 2 ways, for example, as 825470361 + 1442936196 = 28731^2 + 37986^2 .

It is not a de Polignac number, because 2268406557 - 2⁷ = 2268406429 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2268406537) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 115818 + ... + 133979.

It is an arithmetic number, because the mean of its divisors is an integer number (273320645).

Almost surely, 2^2268406557 is an apocalyptic number.

It is an amenable number.

2268406557 is a deficient number, since it is larger than the sum of its proper divisors (1011441183).

2268406557 is a wasteful number, since it uses less digits than its factorization.

2268406557 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 250812 (or 250809 counting only the distinct ones).

The product of its (nonzero) digits is 806400, while the sum is 45.

The square root of 2268406557 is about 47627.7918551763. The cubic root of 2268406557 is about 1313.9342436323.

The spelling of 2268406557 in words is "two billion, two hundred sixty-eight million, four hundred six thousand, five hundred fifty-seven".