52521540816 has 80 divisors (see below), whose sum is σ = 137177331200. Its totient is φ = 17314508160.

The previous prime is 52521540809. The next prime is 52521540847. The reversal of 52521540816 is 61804512525.

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, 4003035 + ... + 4016133.

It is an arithmetic number, because the mean of its divisors is an integer number (1714716640).

Almost surely, 2^52521540816 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 52521540816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68588665600).

52521540816 is an abundant number, since it is smaller than the sum of its proper divisors (84655790384).

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

52521540816 is a wasteful number, since it uses less digits than its factorization.

52521540816 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14024 (or 14018 counting only the distinct ones).

The product of its (nonzero) digits is 96000, while the sum is 39.

The spelling of 52521540816 in words is "fifty-two billion, five hundred twenty-one million, five hundred forty thousand, eight hundred sixteen".