52171938432 has 128 divisors (see below), whose sum is σ = 155156443200. Its totient is φ = 17257743360.

The previous prime is 52171938431. The next prime is 52171938457. The reversal of 52171938432 is 23483917125.

It is a happy number.

52171938432 is a `hidden beast` number, since 5 + 21 + 7 + 193 + 8 + 432 = 666.

It is a tau number, because it is divible by the number of its divisors (128).

It is a super-2 number, since 2×52171938432² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (52171938431) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 395118 + ... + 510354.

Almost surely, 2^52171938432 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 52171938432, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (77578221600).

52171938432 is an abundant number, since it is smaller than the sum of its proper divisors (102984504768).

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

52171938432 is a wasteful number, since it uses less digits than its factorization.

52171938432 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 115391 (or 115373 counting only the distinct ones).

The product of its digits is 362880, while the sum is 45.

The spelling of 52171938432 in words is "fifty-two billion, one hundred seventy-one million, nine hundred thirty-eight thousand, four hundred thirty-two".