51728355403 has 2 divisors, whose sum is σ = 51728355404. Its totient is φ = 51728355402.

The previous prime is 51728355373. The next prime is 51728355451. The reversal of 51728355403 is 30455382715.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 51728355403 - 2¹³ = 51728347211 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 51728355403.

It is not a weakly prime, because it can be changed into another prime (51728355103) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 25864177701 + 25864177702.

It is an arithmetic number, because the mean of its divisors is an integer number (25864177702).

Almost surely, 2^51728355403 is an apocalyptic number.

51728355403 is a deficient number, since it is larger than the sum of its proper divisors (1).

51728355403 is an equidigital number, since it uses as much as digits as its factorization.

51728355403 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 504000, while the sum is 43.

The spelling of 51728355403 in words is "fifty-one billion, seven hundred twenty-eight million, three hundred fifty-five thousand, four hundred three".