52542872440 has 64 divisors (see below), whose sum is σ = 120362112000. Its totient is φ = 20637402240.

The previous prime is 52542872419. The next prime is 52542872467. The reversal of 52542872440 is 4427824525.

It is a super-2 number, since 2×52542872440² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2137741 + ... + 2162179.

It is an arithmetic number, because the mean of its divisors is an integer number (1880658000).

Almost surely, 2^52542872440 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 52542872440, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (60181056000).

52542872440 is an abundant number, since it is smaller than the sum of its proper divisors (67819239560).

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

52542872440 is a wasteful number, since it uses less digits than its factorization.

52542872440 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 25420 (or 25416 counting only the distinct ones).

The product of its (nonzero) digits is 716800, while the sum is 43.

The spelling of 52542872440 in words is "fifty-two billion, five hundred forty-two million, eight hundred seventy-two thousand, four hundred forty".