52516801540 has 144 divisors (see below), whose sum is σ = 136549757232. Its totient is φ = 16857759744.

The previous prime is 52516801537. The next prime is 52516801543. The reversal of 52516801540 is 4510861525.

It is an interprime number because it is at equal distance from previous prime (52516801537) and next prime (52516801543).

It can be written as a sum of positive squares in 8 ways, for example, as 4964893444 + 47551908096 = 70462^2 + 218064^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 52516801540.

It is not an unprimeable number, because it can be changed into a prime (52516801543) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 3207214 + ... + 3223546.

It is an arithmetic number, because the mean of its divisors is an integer number (948262203).

Almost surely, 2^52516801540 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 52516801540, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68274878616).

52516801540 is an abundant number, since it is smaller than the sum of its proper divisors (84032955692).

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

52516801540 is a wasteful number, since it uses less digits than its factorization.

52516801540 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16566 (or 16557 counting only the distinct ones).

The product of its (nonzero) digits is 48000, while the sum is 37.

The spelling of 52516801540 in words is "fifty-two billion, five hundred sixteen million, eight hundred one thousand, five hundred forty".