51853235815 has 48 divisors (see below), whose sum is σ = 65091698496. Its totient is φ = 39645312000.

The previous prime is 51853235813. The next prime is 51853235821.

51853235815 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 51853235815 - 2¹ = 51853235813 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51853235813) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 129309615 + ... + 129310015.

It is an arithmetic number, because the mean of its divisors is an integer number (1356077052).

Almost surely, 2^51853235815 is an apocalyptic number.

51853235815 is a deficient number, since it is larger than the sum of its proper divisors (13238462681).

51853235815 is a wasteful number, since it uses less digits than its factorization.

51853235815 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 760 (or 717 counting only the distinct ones).

The product of its digits is 720000, while the sum is 46.

The spelling of 51853235815 in words is "fifty-one billion, eight hundred fifty-three million, two hundred thirty-five thousand, eight hundred fifteen".