2545228618 has 4 divisors (see below), whose sum is σ = 3817842930. Its totient is φ = 1272614308.

The previous prime is 2545228597. The next prime is 2545228639. The reversal of 2545228618 is 8168225452.

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

It is an interprime number because it is at equal distance from previous prime (2545228597) and next prime (2545228639).

It can be written as a sum of positive squares in only one way, i.e., 2523354289 + 21874329 = 50233^2 + 4677^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 636307153 + ... + 636307156.

Almost surely, 2^2545228618 is an apocalyptic number.

2545228618 is a deficient number, since it is larger than the sum of its proper divisors (1272614312).

2545228618 is a wasteful number, since it uses less digits than its factorization.

2545228618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1272614311.

The product of its digits is 307200, while the sum is 43.

The square root of 2545228618 is about 50450.2588496828. The cubic root of 2545228618 is about 1365.3445650740.

The spelling of 2545228618 in words is "two billion, five hundred forty-five million, two hundred twenty-eight thousand, six hundred eighteen".