51365140008 has 256 divisors, whose sum is σ = 167762327040. Its totient is φ = 12718080000.

The previous prime is 51365139997. The next prime is 51365140019. The reversal of 51365140008 is 80004156315.

It is an interprime number because it is at equal distance from previous prime (51365139997) and next prime (51365140019).

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 17114508 + ... + 17117508.

It is an arithmetic number, because the mean of its divisors is an integer number (655321590).

Almost surely, 2^51365140008 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 51365140008, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (83881163520).

51365140008 is an abundant number, since it is smaller than the sum of its proper divisors (116397187032).

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

51365140008 is a wasteful number, since it uses less digits than its factorization.

51365140008 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3508 (or 3504 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 33.

The spelling of 51365140008 in words is "fifty-one billion, three hundred sixty-five million, one hundred forty thousand, eight".