52381644840 has 192 divisors, whose sum is σ = 203112705600. Its totient is φ = 11972935296.

The previous prime is 52381644839. The next prime is 52381644869. The reversal of 52381644840 is 4844618325.

52381644840 is a `hidden beast` number, since 5 + 2 + 3 + 8 + 164 + 484 + 0 = 666.

It is a super-2 number, since 2×52381644840² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is an unprimeable number.

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 47 ways as a sum of consecutive naturals, for example, 441994 + ... + 547833.

It is an arithmetic number, because the mean of its divisors is an integer number (1057878675).

Almost surely, 2^52381644840 is an apocalyptic number.

It is an amenable number.

52381644840 is an abundant number, since it is smaller than the sum of its proper divisors (150731060760).

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

52381644840 is a wasteful number, since it uses less digits than its factorization.

52381644840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 989861 (or 989844 counting only the distinct ones).

The product of its (nonzero) digits is 737280, while the sum is 45.

The spelling of 52381644840 in words is "fifty-two billion, three hundred eighty-one million, six hundred forty-four thousand, eight hundred forty".