51656134112 has 48 divisors (see below), whose sum is σ = 111040381872. Its totient is φ = 23459512320.

The previous prime is 51656134109. The next prime is 51656134129. The reversal of 51656134112 is 21143165615.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 342218 + ... + 469494.

It is an arithmetic number, because the mean of its divisors is an integer number (2313341289).

Almost surely, 2^51656134112 is an apocalyptic number.

It is an amenable number.

51656134112 is an abundant number, since it is smaller than the sum of its proper divisors (59384247760).

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

51656134112 is a wasteful number, since it uses less digits than its factorization.

51656134112 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128451 (or 128443 counting only the distinct ones).

The product of its digits is 21600, while the sum is 35.

Adding to 51656134112 its reverse (21143165615), we get a palindrome (72799299727).

The spelling of 51656134112 in words is "fifty-one billion, six hundred fifty-six million, one hundred thirty-four thousand, one hundred twelve".