51856935064 has 32 divisors (see below), whose sum is σ = 106168780800. Its totient is φ = 23549605920.

The previous prime is 51856935043. The next prime is 51856935083. The reversal of 51856935064 is 46053965815.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 175404 + ... + 366715.

It is an arithmetic number, because the mean of its divisors is an integer number (3317774400).

Almost surely, 2^51856935064 is an apocalyptic number.

It is an amenable number.

51856935064 is an abundant number, since it is smaller than the sum of its proper divisors (54311845736).

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

51856935064 is a wasteful number, since it uses less digits than its factorization.

51856935064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 543223 (or 543219 counting only the distinct ones).

The product of its (nonzero) digits is 3888000, while the sum is 52.

The spelling of 51856935064 in words is "fifty-one billion, eight hundred fifty-six million, nine hundred thirty-five thousand, sixty-four".