64523188368 has 120 divisors (see below), whose sum is σ = 188662264128. Its totient is φ = 20546862336.

The previous prime is 64523188361. The next prime is 64523188393. The reversal of 64523188368 is 86388132546.

64523188368 is a `hidden beast` number, since 6 + 4 + 523 + 1 + 88 + 36 + 8 = 666.

It is not an unprimeable number, because it can be changed into a prime (64523188361) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 2727246 + ... + 2750802.

Almost surely, 2^64523188368 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 64523188368, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (94331132064).

64523188368 is an abundant number, since it is smaller than the sum of its proper divisors (124139075760).

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

64523188368 is a wasteful number, since it uses less digits than its factorization.

64523188368 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 24421 (or 24412 counting only the distinct ones).

The product of its digits is 6635520, while the sum is 54.

The spelling of 64523188368 in words is "sixty-four billion, five hundred twenty-three million, one hundred eighty-eight thousand, three hundred sixty-eight".