51328508832 has 72 divisors (see below), whose sum is σ = 146463863364. Its totient is φ = 17051080704.

The previous prime is 51328508821. The next prime is 51328508837. The reversal of 51328508832 is 23880582315.

51328508832 is a `hidden beast` number, since 5 + 132 + 8 + 508 + 8 + 3 + 2 = 666.

It can be written as a sum of positive squares in 2 ways, for example, as 51237038736 + 91470096 = 226356^2 + 9564^2 .

It is a tau number, because it is divible by the number of its divisors (72).

It is a hoax number, since the sum of its digits (45) coincides with the sum of the digits of its distinct prime factors.

It is not an unprimeable number, because it can be changed into a prime (51328508837) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 219753 + ... + 388520.

Almost surely, 2^51328508832 is an apocalyptic number.

It is an amenable number.

51328508832 is an abundant number, since it is smaller than the sum of its proper divisors (95135354532).

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

51328508832 is a wasteful number, since it uses less digits than its factorization.

51328508832 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 608582 (or 608571 counting only the distinct ones).

The product of its (nonzero) digits is 460800, while the sum is 45.

The spelling of 51328508832 in words is "fifty-one billion, three hundred twenty-eight million, five hundred eight thousand, eight hundred thirty-two".