51636434203 has 2 divisors, whose sum is σ = 51636434204. Its totient is φ = 51636434202.

The previous prime is 51636434189. The next prime is 51636434249. The reversal of 51636434203 is 30243463615.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-51636434203 is a prime.

It is not a weakly prime, because it can be changed into another prime (51636534203) 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 as a sum of consecutive naturals, namely, 25818217101 + 25818217102.

It is an arithmetic number, because the mean of its divisors is an integer number (25818217102).

Almost surely, 2^51636434203 is an apocalyptic number.

51636434203 is a deficient number, since it is larger than the sum of its proper divisors (1).

51636434203 is an equidigital number, since it uses as much as digits as its factorization.

51636434203 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 155520, while the sum is 37.

Adding to 51636434203 its reverse (30243463615), we get a palindrome (81879897818).

The spelling of 51636434203 in words is "fifty-one billion, six hundred thirty-six million, four hundred thirty-four thousand, two hundred three".