51684625168 has 80 divisors (see below), whose sum is σ = 114059664000. Its totient is φ = 22458275840.

The previous prime is 51684625129. The next prime is 51684625169. The reversal of 51684625168 is 86152648615.

It is not an unprimeable number, because it can be changed into a prime (51684625169) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10315848 + ... + 10320856.

It is an arithmetic number, because the mean of its divisors is an integer number (1425745800).

Almost surely, 2^51684625168 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 51684625168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (57029832000).

51684625168 is an abundant number, since it is smaller than the sum of its proper divisors (62375038832).

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

51684625168 is a wasteful number, since it uses less digits than its factorization.

51684625168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7600 (or 7594 counting only the distinct ones).

The product of its digits is 2764800, while the sum is 52.

The spelling of 51684625168 in words is "fifty-one billion, six hundred eighty-four million, six hundred twenty-five thousand, one hundred sixty-eight".