51544330139 has 8 divisors (see below), whose sum is σ = 54671369280. Its totient is φ = 48458709000.

The previous prime is 51544330129. The next prime is 51544330163. The reversal of 51544330139 is 93103344515.

It is a happy number.

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 51544330139 - 2³² = 47249362843 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51544330129) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 10351937 + ... + 10356914.

It is an arithmetic number, because the mean of its divisors is an integer number (6833921160).

Almost surely, 2^51544330139 is an apocalyptic number.

51544330139 is a deficient number, since it is larger than the sum of its proper divisors (3127039141).

51544330139 is a wasteful number, since it uses less digits than its factorization.

51544330139 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20709001.

The product of its (nonzero) digits is 97200, while the sum is 38.

The spelling of 51544330139 in words is "fifty-one billion, five hundred forty-four million, three hundred thirty thousand, one hundred thirty-nine".