64534489344 has 576 divisors, whose sum is σ = 220663699200. Its totient is φ = 18427281408.

The previous prime is 64534489321. The next prime is 64534489363. The reversal of 64534489344 is 44398443546.

64534489344 is a `hidden beast` number, since 64 + 53 + 448 + 93 + 4 + 4 = 666.

It is a tau number, because it is divible by the number of its divisors (576).

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

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 126786562 + ... + 126787070.

It is an arithmetic number, because the mean of its divisors is an integer number (383096700).

Almost surely, 2^64534489344 is an apocalyptic number.

64534489344 is a gapful number since it is divisible by the number (64) 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 64534489344, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (110331849600).

64534489344 is an abundant number, since it is smaller than the sum of its proper divisors (156129209856).

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

64534489344 is a wasteful number, since it uses less digits than its factorization.

64534489344 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 647 (or 627 counting only the distinct ones).

The product of its digits is 19906560, while the sum is 54.

It can be divided in two parts, 64534 and 489344, that added together give a triangular number (553878 = T₁₀₅₂).

The spelling of 64534489344 in words is "sixty-four billion, five hundred thirty-four million, four hundred eighty-nine thousand, three hundred forty-four".