51856386281740 has 48 divisors (see below), whose sum is σ = 109054589051520. Its totient is φ = 20712808857600.

The previous prime is 51856386281627. The next prime is 51856386281797. The reversal of 51856386281740 is 4718268365815.

51856386281740 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 405466444 + ... + 405594316.

It is an arithmetic number, because the mean of its divisors is an integer number (2271970605240).

Almost surely, 2^{51856386281740} is an apocalyptic number.

It is an amenable number.

51856386281740 is an abundant number, since it is smaller than the sum of its proper divisors (57198202769780).

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

51856386281740 is a wasteful number, since it uses less digits than its factorization.

51856386281740 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 156802 (or 156800 counting only the distinct ones).

The product of its (nonzero) digits is 77414400, while the sum is 64.

The spelling of 51856386281740 in words is "fifty-one trillion, eight hundred fifty-six billion, three hundred eighty-six million, two hundred eighty-one thousand, seven hundred forty".