51853386918 has 8 divisors (see below), whose sum is σ = 103706773848. Its totient is φ = 17284462304.

The previous prime is 51853386887. The next prime is 51853386953. The reversal of 51853386918 is 81968335815.

It is a happy number.

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

51853386918 is an admirable number.

It is a congruent number.

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 in 3 ways as a sum of consecutive naturals, for example, 4321115571 + ... + 4321115582.

It is an arithmetic number, because the mean of its divisors is an integer number (12963346731).

Almost surely, 2^51853386918 is an apocalyptic number.

51853386918 is a primitive abundant number, since it is smaller than the sum of its proper divisors, none of which is abundant.

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51853386918 is a wasteful number, since it uses less digits than its factorization.

51853386918 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 8642231158.

The product of its digits is 6220800, while the sum is 57.

The spelling of 51853386918 in words is "fifty-one billion, eight hundred fifty-three million, three hundred eighty-six thousand, nine hundred eighteen".