51755013778 has 16 divisors (see below), whose sum is σ = 83814859800. Its totient is φ = 23826756096.

The previous prime is 51755013727. The next prime is 51755013781. The reversal of 51755013778 is 87731055715.

It can be written as a sum of positive squares in 4 ways, for example, as 36451591929 + 15303421849 = 190923^2 + 123707^2 .

It is an unprimeable number.

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 in 7 ways as a sum of consecutive naturals, for example, 2496703 + ... + 2517346.

Almost surely, 2^51755013778 is an apocalyptic number.

51755013778 is a deficient number, since it is larger than the sum of its proper divisors (32059846022).

51755013778 is a wasteful number, since it uses less digits than its factorization.

51755013778 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5014461.

The product of its (nonzero) digits is 1029000, while the sum is 49.

The spelling of 51755013778 in words is "fifty-one billion, seven hundred fifty-five million, thirteen thousand, seven hundred seventy-eight".