51728355419 has 4 divisors (see below), whose sum is σ = 55707459696. Its totient is φ = 47749251144.

The previous prime is 51728355403. The next prime is 51728355451. The reversal of 51728355419 is 91455382715.

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 51728355419 - 2⁴ = 51728355403 is a prime.

It is a super-2 number, since 2×51728355419² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (51728355319) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1989552119 + ... + 1989552144.

It is an arithmetic number, because the mean of its divisors is an integer number (13926864924).

Almost surely, 2^51728355419 is an apocalyptic number.

51728355419 is a deficient number, since it is larger than the sum of its proper divisors (3979104277).

51728355419 is a wasteful number, since it uses less digits than its factorization.

51728355419 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3979104276.

The product of its digits is 1512000, while the sum is 50.

The spelling of 51728355419 in words is "fifty-one billion, seven hundred twenty-eight million, three hundred fifty-five thousand, four hundred nineteen".