51651602860 has 192 divisors, whose sum is σ = 135193411584. Its totient is φ = 16285593600.

The previous prime is 51651602839. The next prime is 51651602869. The reversal of 51651602860 is 6820615615.

It is not an unprimeable number, because it can be changed into a prime (51651602869) by changing a digit.

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 63 ways as a sum of consecutive naturals, for example, 41958445 + ... + 41959675.

It is an arithmetic number, because the mean of its divisors is an integer number (704132352).

Almost surely, 2^51651602860 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 51651602860, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (67596705792).

51651602860 is an abundant number, since it is smaller than the sum of its proper divisors (83541808724).

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

51651602860 is a wasteful number, since it uses less digits than its factorization.

51651602860 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2144 (or 2142 counting only the distinct ones).

The product of its (nonzero) digits is 86400, while the sum is 40.

The spelling of 51651602860 in words is "fifty-one billion, six hundred fifty-one million, six hundred two thousand, eight hundred sixty".