64993398192 has 480 divisors, whose sum is σ = 207726704640. Its totient is φ = 19595520000.

The previous prime is 64993398191. The next prime is 64993398193. The reversal of 64993398192 is 29189339946.

It is an interprime number because it is at equal distance from previous prime (64993398191) and next prime (64993398193).

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

It is not an unprimeable number, because it can be changed into a prime (64993398191) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 231293092 + ... + 231293372.

It is an arithmetic number, because the mean of its divisors is an integer number (432763968).

Almost surely, 2^64993398192 is an apocalyptic number.

64993398192 is a gapful number since it is divisible by the number (62) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64993398192, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (103863352320).

64993398192 is an abundant number, since it is smaller than the sum of its proper divisors (142733306448).

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

64993398192 is a wasteful number, since it uses less digits than its factorization.

64993398192 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 455 (or 437 counting only the distinct ones).

The product of its digits is 22674816, while the sum is 63.

The spelling of 64993398192 in words is "sixty-four billion, nine hundred ninety-three million, three hundred ninety-eight thousand, one hundred ninety-two".