51248786688 has 216 divisors, whose sum is σ = 163607205216. Its totient is φ = 15297638400.

The previous prime is 51248786681. The next prime is 51248786723. The reversal of 51248786688 is 88668784215.

51248786688 is a `hidden beast` number, since 5 + 12 + 487 + 8 + 66 + 88 = 666.

51248786688 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51248786681) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 1682958 + ... + 1713138.

Almost surely, 2^51248786688 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 51248786688, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (81803602608).

51248786688 is an abundant number, since it is smaller than the sum of its proper divisors (112358418528).

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

51248786688 is a wasteful number, since it uses less digits than its factorization.

51248786688 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 30281 (or 30264 counting only the distinct ones).

The product of its digits is 41287680, while the sum is 63.

The spelling of 51248786688 in words is "fifty-one billion, two hundred forty-eight million, seven hundred eighty-six thousand, six hundred eighty-eight".