51235136336 has 20 divisors (see below), whose sum is σ = 99900362292. Its totient is φ = 25454397696.

The previous prime is 51235136327. The next prime is 51235136339. The reversal of 51235136336 is 63363153215.

It can be written as a sum of positive squares in 2 ways, for example, as 34759873600 + 16475262736 = 186440^2 + 128356^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 51235136336.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51235136339) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 10195565 + ... + 10200588.

Almost surely, 2^51235136336 is an apocalyptic number.

It is an amenable number.

51235136336 is a deficient number, since it is larger than the sum of its proper divisors (48665225956).

51235136336 is a wasteful number, since it uses less digits than its factorization.

51235136336 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 20396318 (or 20396312 counting only the distinct ones).

The product of its digits is 145800, while the sum is 38.

The spelling of 51235136336 in words is "fifty-one billion, two hundred thirty-five million, one hundred thirty-six thousand, three hundred thirty-six".