51728517383 has 4 divisors (see below), whose sum is σ = 52027526328. Its totient is φ = 51429508440.

The previous prime is 51728517359. The next prime is 51728517397. The reversal of 51728517383 is 38371582715.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51728517383 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 (51728517283) 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 3 ways as a sum of consecutive naturals, for example, 149504213 + ... + 149504558.

It is an arithmetic number, because the mean of its divisors is an integer number (13006881582).

Almost surely, 2^51728517383 is an apocalyptic number.

51728517383 is a deficient number, since it is larger than the sum of its proper divisors (299008945).

51728517383 is a wasteful number, since it uses less digits than its factorization.

51728517383 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 299008944.

The product of its digits is 1411200, while the sum is 50.

The spelling of 51728517383 in words is "fifty-one billion, seven hundred twenty-eight million, five hundred seventeen thousand, three hundred eighty-three".