2268661857 has 16 divisors (see below), whose sum is σ = 3771282432. Its totient is φ = 1178525520.

The previous prime is 2268661841. The next prime is 2268661903. The reversal of 2268661857 is 7581668622.

It is a happy number.

It is not a de Polignac number, because 2268661857 - 2⁴ = 2268661841 is a prime.

It is not an unprimeable number, because it can be changed into a prime (2268661357) 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, 4910293 + ... + 4910754.

It is an arithmetic number, because the mean of its divisors is an integer number (235705152).

Almost surely, 2^2268661857 is an apocalyptic number.

It is an amenable number.

2268661857 is a deficient number, since it is larger than the sum of its proper divisors (1502620575).

2268661857 is a wasteful number, since it uses less digits than its factorization.

2268661857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9821068.

The product of its digits is 1935360, while the sum is 51.

The square root of 2268661857 is about 47630.4719376157. The cubic root of 2268661857 is about 1313.9835344480.

The spelling of 2268661857 in words is "two billion, two hundred sixty-eight million, six hundred sixty-one thousand, eight hundred fifty-seven".