51032491488 has 216 divisors, whose sum is σ = 168901334784. Its totient is φ = 14554552320.

The previous prime is 51032491487. The next prime is 51032491501. The reversal of 51032491488 is 88419423015.

51032491488 is a `hidden beast` number, since 51 + 0 + 32 + 4 + 91 + 488 = 666.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (51032491487) by changing a digit.

It is a polite number, since it can be written in 35 ways as a sum of consecutive naturals, for example, 549345 + ... + 635487.

It is an arithmetic number, because the mean of its divisors is an integer number (781950624).

Almost surely, 2^51032491488 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 51032491488, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (84450667392).

51032491488 is an abundant number, since it is smaller than the sum of its proper divisors (117868843296).

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

51032491488 is a wasteful number, since it uses less digits than its factorization.

51032491488 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 86198 (or 86176 counting only the distinct ones).

The product of its (nonzero) digits is 276480, while the sum is 45.

The spelling of 51032491488 in words is "fifty-one billion, thirty-two million, four hundred ninety-one thousand, four hundred eighty-eight".