51685372052 has 24 divisors (see below), whose sum is σ = 90627034176. Its totient is φ = 25791974208.

The previous prime is 51685372033. The next prime is 51685372097. The reversal of 51685372052 is 25027358615.

It is a junction number, because it is equal to n+sod(n) for n = 51685371994 and 51685372012.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7884008 + ... + 7890560.

It is an arithmetic number, because the mean of its divisors is an integer number (3776126424).

Almost surely, 2^51685372052 is an apocalyptic number.

It is an amenable number.

51685372052 is a deficient number, since it is larger than the sum of its proper divisors (38941662124).

51685372052 is a wasteful number, since it uses less digits than its factorization.

51685372052 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 10127 (or 10125 counting only the distinct ones).

The product of its (nonzero) digits is 504000, while the sum is 44.

The spelling of 51685372052 in words is "fifty-one billion, six hundred eighty-five million, three hundred seventy-two thousand, fifty-two".