64438841088 has 504 divisors, whose sum is σ = 215143059600. Its totient is φ = 19134185472.

The previous prime is 64438840981. The next prime is 64438841111. The reversal of 64438841088 is 88014883446.

64438841088 is a `hidden beast` number, since 6 + 443 + 88 + 41 + 0 + 88 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 60279018 + ... + 60280086.

It is an arithmetic number, because the mean of its divisors is an integer number (426871150).

Almost surely, 2^64438841088 is an apocalyptic number.

64438841088 is a gapful number since it is divisible by the number (68) 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 64438841088, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (107571529800).

64438841088 is an abundant number, since it is smaller than the sum of its proper divisors (150704218512).

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

64438841088 is a wasteful number, since it uses less digits than its factorization.

64438841088 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1139 (or 1110 counting only the distinct ones).

The product of its (nonzero) digits is 4718592, while the sum is 54.

The spelling of 64438841088 in words is "sixty-four billion, four hundred thirty-eight million, eight hundred forty-one thousand, eighty-eight".