51368217751888 has 40 divisors (see below), whose sum is σ = 101406778128936. Its totient is φ = 25198755379200.

The previous prime is 51368217751871. The next prime is 51368217751927. The reversal of 51368217751888 is 88815771286315.

It can be written as a sum of positive squares in 4 ways, for example, as 21372572810304 + 29995644941584 = 4623048^2 + 5476828^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 28256668 + ... + 30019588.

Almost surely, 2^{51368217751888} is an apocalyptic number.

It is an amenable number.

51368217751888 is a deficient number, since it is larger than the sum of its proper divisors (50038560377048).

51368217751888 is a wasteful number, since it uses less digits than its factorization.

51368217751888 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1797343 (or 1797337 counting only the distinct ones).

The product of its digits is 180633600, while the sum is 70.

The spelling of 51368217751888 in words is "fifty-one trillion, three hundred sixty-eight billion, two hundred seventeen million, seven hundred fifty-one thousand, eight hundred eighty-eight".