51685284373813 has 8 divisors (see below), whose sum is σ = 52703700045920. Its totient is φ = 50672388570480.

The previous prime is 51685284373799. The next prime is 51685284373843. The reversal of 51685284373813 is 31837348258615.

It is a happy number.

51685284373813 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a cyclic number.

It is not a de Polignac number, because 51685284373813 - 2²⁹ = 51684747502901 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51685284373843) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1379948283 + ... + 1379985736.

It is an arithmetic number, because the mean of its divisors is an integer number (6587962505740).

Almost surely, 2^{51685284373813} is an apocalyptic number.

It is an amenable number.

51685284373813 is a deficient number, since it is larger than the sum of its proper divisors (1018415672107).

51685284373813 is a wasteful number, since it uses less digits than its factorization.

51685284373813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2759934387.

The product of its digits is 116121600, while the sum is 64.

The spelling of 51685284373813 in words is "fifty-one trillion, six hundred eighty-five billion, two hundred eighty-four million, three hundred seventy-three thousand, eight hundred thirteen".