52781618 has 8 divisors (see below), whose sum is σ = 79256880. Its totient is φ = 26362660.

The previous prime is 52781593. The next prime is 52781627. The reversal of 52781618 is 81618725.

It is a sphenic number, since it is the product of 3 distinct primes.

It is an alternating number because its digits alternate between odd and even.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 11648 + ... + 15531.

It is an arithmetic number, because the mean of its divisors is an integer number (9907110).

Almost surely, 2^52781618 is an apocalyptic number.

52781618 is a deficient number, since it is larger than the sum of its proper divisors (26475262).

52781618 is a wasteful number, since it uses less digits than its factorization.

52781618 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 28152.

The product of its digits is 26880, while the sum is 38.

The square root of 52781618 is about 7265.0958699800. The cubic root of 52781618 is about 375.1119499833. Note that the first 3 decimals are identical.

The spelling of 52781618 in words is "fifty-two million, seven hundred eighty-one thousand, six hundred eighteen".