64789493832 has 288 divisors, whose sum is σ = 223105259520. Its totient is φ = 16859888640.

The previous prime is 64789493831. The next prime is 64789493861. The reversal of 64789493832 is 23839498746.

64789493832 is a `hidden beast` number, since 64 + 7 + 8 + 9 + 493 + 83 + 2 = 666.

It is a super-2 number, since 2×64789493832² (a number of 22 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (63).

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

It is a self number, because there is not a number n which added to its sum of digits gives 64789493832.

It is not an unprimeable number, because it can be changed into a prime (64789493831) by changing a digit.

It is a polite number, since it can be written in 71 ways as a sum of consecutive naturals, for example, 1841833 + ... + 1876679.

It is an arithmetic number, because the mean of its divisors is an integer number (774671040).

Almost surely, 2^64789493832 is an apocalyptic number.

64789493832 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 64789493832, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (111552629760).

64789493832 is an abundant number, since it is smaller than the sum of its proper divisors (158315765688).

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

64789493832 is a wasteful number, since it uses less digits than its factorization.

64789493832 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 34921 (or 34907 counting only the distinct ones).

The product of its digits is 62705664, while the sum is 63.

The spelling of 64789493832 in words is "sixty-four billion, seven hundred eighty-nine million, four hundred ninety-three thousand, eight hundred thirty-two".