52323366640 has 80 divisors (see below), whose sum is σ = 127129863168. Its totient is φ = 20007606528.

The previous prime is 52323366617. The next prime is 52323366643. The reversal of 52323366640 is 4666332325.

It is a tau number, because it is divible by the number of its divisors (80).

It is a Harshad number since it is a multiple of its sum of digits (40).

It is a junction number, because it is equal to n+sod(n) for n = 52323366593 and 52323366602.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (52323366643) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 132 + ... + 323491.

Almost surely, 2^52323366640 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 52323366640, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (63564931584).

52323366640 is an abundant number, since it is smaller than the sum of its proper divisors (74806496528).

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

52323366640 is a wasteful number, since it uses less digits than its factorization.

52323366640 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 323726 (or 323720 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 40.

Adding to 52323366640 its reverse (4666332325), we get a palindrome (56989698965).

The spelling of 52323366640 in words is "fifty-two billion, three hundred twenty-three million, three hundred sixty-six thousand, six hundred forty".