64363989312 has 168 divisors, whose sum is σ = 218652522816. Its totient is φ = 18389680128.

The previous prime is 64363989311. The next prime is 64363989379. The reversal of 64363989312 is 21398936346.

It is a tau number, because it is divible by the number of its divisors (168).

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

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64363989311) 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, 186753 + ... + 404480.

It is an arithmetic number, because the mean of its divisors is an integer number (1301503112).

Almost surely, 2^64363989312 is an apocalyptic number.

It is an amenable number.

64363989312 is an abundant number, since it is smaller than the sum of its proper divisors (154288533504).

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

64363989312 is an equidigital number, since it uses as much as digits as its factorization.

64363989312 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 591267 (or 591245 counting only the distinct ones).

The product of its digits is 5038848, while the sum is 54.

The spelling of 64363989312 in words is "sixty-four billion, three hundred sixty-three million, nine hundred eighty-nine thousand, three hundred twelve".