51787854393 has 16 divisors (see below), whose sum is σ = 79292409600. Its totient is φ = 29734652880.

The previous prime is 51787854379. The next prime is 51787854397. The reversal of 51787854393 is 39345878715.

It is a happy number.

It is not a de Polignac number, because 51787854393 - 2⁵ = 51787854361 is a prime.

It is not an unprimeable number, because it can be changed into a prime (51787854397) 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 15 ways as a sum of consecutive naturals, for example, 41297503 + ... + 41298756.

It is an arithmetic number, because the mean of its divisors is an integer number (4955775600).

Almost surely, 2^51787854393 is an apocalyptic number.

It is an amenable number.

51787854393 is a deficient number, since it is larger than the sum of its proper divisors (27504555207).

51787854393 is a wasteful number, since it uses less digits than its factorization.

51787854393 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82596292.

The product of its digits is 25401600, while the sum is 60.

The spelling of 51787854393 in words is "fifty-one billion, seven hundred eighty-seven million, eight hundred fifty-four thousand, three hundred ninety-three".