64199716320 has 96 divisors (see below), whose sum is σ = 202712388480. Its totient is φ = 17079011840.

The previous prime is 64199716297. The next prime is 64199716327. The reversal of 64199716320 is 2361799146.

It is a tau number, because it is divible by the number of its divisors (96).

It is a Harshad number since it is a multiple of its sum of digits (48).

It is a self number, because there is not a number n which added to its sum of digits gives 64199716320.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64199716327) 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, 41515 + ... + 360725.

It is an arithmetic number, because the mean of its divisors is an integer number (2111587380).

Almost surely, 2^64199716320 is an apocalyptic number.

64199716320 is a gapful number since it is divisible by the number (60) 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 64199716320, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101356194240).

64199716320 is an abundant number, since it is smaller than the sum of its proper divisors (138512672160).

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

64199716320 is a wasteful number, since it uses less digits than its factorization.

64199716320 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 319648 (or 319640 counting only the distinct ones).

The product of its (nonzero) digits is 489888, while the sum is 48.

The spelling of 64199716320 in words is "sixty-four billion, one hundred ninety-nine million, seven hundred sixteen thousand, three hundred twenty".