51511813248 has 256 divisors, whose sum is σ = 158939827200. Its totient is φ = 14477930496.

The previous prime is 51511813231. The next prime is 51511813259. The reversal of 51511813248 is 84231811515.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 83217483 + ... + 83218101.

It is an arithmetic number, because the mean of its divisors is an integer number (620858700).

Almost surely, 2^51511813248 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 51511813248, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (79469913600).

51511813248 is an abundant number, since it is smaller than the sum of its proper divisors (107428013952).

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

51511813248 is a wasteful number, since it uses less digits than its factorization.

51511813248 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1099 (or 1087 counting only the distinct ones).

The product of its digits is 38400, while the sum is 39.

The spelling of 51511813248 in words is "fifty-one billion, five hundred eleven million, eight hundred thirteen thousand, two hundred forty-eight".