51687832437321 has 8 divisors (see below), whose sum is σ = 68917898601984. Its totient is φ = 34458160615440.

The previous prime is 51687832437299. The next prime is 51687832437331. The reversal of 51687832437321 is 12373423878615.

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

It is not a de Polignac number, because 51687832437321 - 2²⁹ = 51687295566409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51687832437331) 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 7 ways as a sum of consecutive naturals, for example, 98279721 + ... + 98804246.

It is an arithmetic number, because the mean of its divisors is an integer number (8614737325248).

Almost surely, 2^{51687832437321} is an apocalyptic number.

It is an amenable number.

51687832437321 is a deficient number, since it is larger than the sum of its proper divisors (17230066164663).

51687832437321 is a wasteful number, since it uses less digits than its factorization.

51687832437321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 197171391.

The product of its digits is 40642560, while the sum is 60.

The spelling of 51687832437321 in words is "fifty-one trillion, six hundred eighty-seven billion, eight hundred thirty-two million, four hundred thirty-seven thousand, three hundred twenty-one".