52253187840 has 864 divisors, whose sum is σ = 215776544256. Its totient is φ = 11426365440.

The previous prime is 52253187823. The next prime is 52253187851. The reversal of 52253187840 is 4878135225.

52253187840 is a `hidden beast` number, since 5 + 2 + 2 + 531 + 8 + 78 + 40 = 666.

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

It is a congruent number.

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 95 ways as a sum of consecutive naturals, for example, 247645335 + ... + 247645545.

Almost surely, 2^52253187840 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 52253187840, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107888272128).

52253187840 is an abundant number, since it is smaller than the sum of its proper divisors (163523356416).

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

52253187840 is a wasteful number, since it uses less digits than its factorization.

52253187840 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 365 (or 348 counting only the distinct ones).

The product of its (nonzero) digits is 537600, while the sum is 45.

The spelling of 52253187840 in words is "fifty-two billion, two hundred fifty-three million, one hundred eighty-seven thousand, eight hundred forty".