2256169018 has 4 divisors (see below), whose sum is σ = 3384253530. Its totient is φ = 1128084508.

The previous prime is 2256169009. The next prime is 2256169039. The reversal of 2256169018 is 8109616522.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 2249320329 + 6848689 = 47427^2 + 2617^2 .

It is a Smith number, since the sum of its digits (40) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 564042253 + ... + 564042256.

Almost surely, 2^2256169018 is an apocalyptic number.

2256169018 is a deficient number, since it is larger than the sum of its proper divisors (1128084512).

2256169018 is a wasteful number, since it uses less digits than its factorization.

2256169018 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1128084511.

The product of its (nonzero) digits is 51840, while the sum is 40.

The square root of 2256169018 is about 47499.1475502456. The cubic root of 2256169018 is about 1311.5671895082.

The spelling of 2256169018 in words is "two billion, two hundred fifty-six million, one hundred sixty-nine thousand, eighteen".