51685761036 has 48 divisors (see below), whose sum is σ = 148430906624. Its totient is φ = 13631409216.

The previous prime is 51685761013. The next prime is 51685761041. The reversal of 51685761036 is 63016758615.

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 15 ways as a sum of consecutive naturals, for example, 23664550 + ... + 23666733.

Almost surely, 2^51685761036 is an apocalyptic number.

It is an amenable number.

51685761036 is an abundant number, since it is smaller than the sum of its proper divisors (96745145588).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

51685761036 is a wasteful number, since it uses less digits than its factorization.

51685761036 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47331310 (or 47331308 counting only the distinct ones).

The product of its (nonzero) digits is 907200, while the sum is 48.

The spelling of 51685761036 in words is "fifty-one billion, six hundred eighty-five million, seven hundred sixty-one thousand, thirty-six".