51328843778 has 4 divisors (see below), whose sum is σ = 76993265670. Its totient is φ = 25664421888.

The previous prime is 51328843771. The next prime is 51328843789. The reversal of 51328843778 is 87734882315.

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

It can be written as a sum of positive squares in only one way, i.e., 43312685689 + 8016158089 = 208117^2 + 89533^2 .

It is not an unprimeable number, because it can be changed into a prime (51328843771) 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 as a sum of consecutive naturals, namely, 12832210943 + ... + 12832210946.

Almost surely, 2^51328843778 is an apocalyptic number.

51328843778 is a deficient number, since it is larger than the sum of its proper divisors (25664421892).

51328843778 is a wasteful number, since it uses less digits than its factorization.

51328843778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 25664421891.

The product of its digits is 9031680, while the sum is 56.

The spelling of 51328843778 in words is "fifty-one billion, three hundred twenty-eight million, eight hundred forty-three thousand, seven hundred seventy-eight".