51683710638 has 32 divisors (see below), whose sum is σ = 118313521920. Its totient is φ = 14744358720.

The previous prime is 51683710627. The next prime is 51683710657. The reversal of 51683710638 is 83601738615.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 905983 + ... + 961338.

It is an arithmetic number, because the mean of its divisors is an integer number (3697297560).

Almost surely, 2^51683710638 is an apocalyptic number.

51683710638 is an abundant number, since it is smaller than the sum of its proper divisors (66629811282).

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

51683710638 is a wasteful number, since it uses less digits than its factorization.

51683710638 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1867992.

The product of its (nonzero) digits is 725760, while the sum is 48.

The spelling of 51683710638 in words is "fifty-one billion, six hundred eighty-three million, seven hundred ten thousand, six hundred thirty-eight".