2145584618 has 4 divisors (see below), whose sum is σ = 3218376930. Its totient is φ = 1072792308.

The previous prime is 2145584591. The next prime is 2145584629. The reversal of 2145584618 is 8164855412.

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., 1735805569 + 409779049 = 41663^2 + 20243^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 536396153 + ... + 536396156.

Almost surely, 2^2145584618 is an apocalyptic number.

2145584618 is a deficient number, since it is larger than the sum of its proper divisors (1072792312).

2145584618 is a wasteful number, since it uses less digits than its factorization.

2145584618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1072792311.

The product of its digits is 307200, while the sum is 44.

The square root of 2145584618 is about 46320.4557188290. The cubic root of 2145584618 is about 1289.7787449792.

The spelling of 2145584618 in words is "two billion, one hundred forty-five million, five hundred eighty-four thousand, six hundred eighteen".