51398882808 has 384 divisors, whose sum is σ = 168824113920. Its totient is φ = 12910786560.

The previous prime is 51398882807. The next prime is 51398882809. The reversal of 51398882808 is 80828889315.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (51398882807) and next prime (51398882809).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51398882807) by changing a digit.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 26951791 + ... + 26953697.

It is an arithmetic number, because the mean of its divisors is an integer number (439646130).

Almost surely, 2^51398882808 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 51398882808, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84412056960).

51398882808 is an abundant number, since it is smaller than the sum of its proper divisors (117425231112).

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

51398882808 is a wasteful number, since it uses less digits than its factorization.

51398882808 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2027 (or 2016 counting only the distinct ones).

The product of its (nonzero) digits is 8847360, while the sum is 60.

The spelling of 51398882808 in words is "fifty-one billion, three hundred ninety-eight million, eight hundred eighty-two thousand, eight hundred eight".