51778613289 has 16 divisors (see below), whose sum is σ = 75115265792. Its totient is φ = 31535267328.

The previous prime is 51778613261. The next prime is 51778613303. The reversal of 51778613289 is 98231687715.

It is a happy number.

It is not a de Polignac number, because 51778613289 - 2⁹ = 51778612777 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (51778613389) 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 in 15 ways as a sum of consecutive naturals, for example, 6839809 + ... + 6847374.

It is an arithmetic number, because the mean of its divisors is an integer number (4694704112).

Almost surely, 2^51778613289 is an apocalyptic number.

It is an amenable number.

51778613289 is a deficient number, since it is larger than the sum of its proper divisors (23336652503).

51778613289 is a wasteful number, since it uses less digits than its factorization.

51778613289 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13687296.

The product of its digits is 5080320, while the sum is 57.

The spelling of 51778613289 in words is "fifty-one billion, seven hundred seventy-eight million, six hundred thirteen thousand, two hundred eighty-nine".