51081507488 has 96 divisors (see below), whose sum is σ = 110627016192. Its totient is φ = 23025484800.

The previous prime is 51081507473. The next prime is 51081507527. The reversal of 51081507488 is 88470518015.

51081507488 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 22998218 + ... + 23000438.

It is an arithmetic number, because the mean of its divisors is an integer number (1152364752).

Almost surely, 2^51081507488 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 51081507488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (55313508096).

51081507488 is an abundant number, since it is smaller than the sum of its proper divisors (59545508704).

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

51081507488 is a wasteful number, since it uses less digits than its factorization.

51081507488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2758 (or 2750 counting only the distinct ones).

The product of its (nonzero) digits is 358400, while the sum is 47.

The spelling of 51081507488 in words is "fifty-one billion, eighty-one million, five hundred seven thousand, four hundred eighty-eight".