52521000664 has 128 divisors (see below), whose sum is σ = 113353966080. Its totient is φ = 22581504000.

The previous prime is 52521000661. The next prime is 52521000673. The reversal of 52521000664 is 46600012525.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52521000661) by changing a digit.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 130974864 + ... + 130975264.

It is an arithmetic number, because the mean of its divisors is an integer number (885577860).

Almost surely, 2^52521000664 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 52521000664, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (56676983040).

52521000664 is an abundant number, since it is smaller than the sum of its proper divisors (60832965416).

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

52521000664 is a wasteful number, since it uses less digits than its factorization.

52521000664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1001 (or 997 counting only the distinct ones).

The product of its (nonzero) digits is 14400, while the sum is 31.

The spelling of 52521000664 in words is "fifty-two billion, five hundred twenty-one million, six hundred sixty-four", and thus it is an aban number.