64820523575232 has 168 divisors, whose sum is σ = 192692993964016. Its totient is φ = 21605123063808.

The previous prime is 64820523575179. The next prime is 64820523575237. The reversal of 64820523575232 is 23257532502846.

64820523575232 is a `hidden beast` number, since 6 + 4 + 8 + 2 + 0 + 52 + 357 + 5 + 232 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64820523575237) 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, 203463168 + ... + 203781504.

Almost surely, 2^{64820523575232} 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 64820523575232, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (96346496982008).

64820523575232 is an abundant number, since it is smaller than the sum of its proper divisors (127872470388784).

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

64820523575232 is a wasteful number, since it uses less digits than its factorization.

64820523575232 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 331457 (or 331435 counting only the distinct ones).

The product of its (nonzero) digits is 24192000, while the sum is 54.

The spelling of 64820523575232 in words is "sixty-four trillion, eight hundred twenty billion, five hundred twenty-three million, five hundred seventy-five thousand, two hundred thirty-two".