51858693739 has 4 divisors (see below), whose sum is σ = 51859643656. Its totient is φ = 51857743824.

The previous prime is 51858693703. The next prime is 51858693743. The reversal of 51858693739 is 93739685815.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 51858693739 - 2¹¹ = 51858691691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51858693779) 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 3 ways as a sum of consecutive naturals, for example, 387729 + ... + 504034.

It is an arithmetic number, because the mean of its divisors is an integer number (12964910914).

Almost surely, 2^51858693739 is an apocalyptic number.

51858693739 is a deficient number, since it is larger than the sum of its proper divisors (949917).

51858693739 is an equidigital number, since it uses as much as digits as its factorization.

51858693739 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 949916.

The product of its digits is 48988800, while the sum is 64.

The spelling of 51858693739 in words is "fifty-one billion, eight hundred fifty-eight million, six hundred ninety-three thousand, seven hundred thirty-nine".