64444880880 has 160 divisors (see below), whose sum is σ = 227139390720. Its totient is φ = 16785619200.

The previous prime is 64444880861. The next prime is 64444880891. The reversal of 64444880880 is 8808844446.

It is a happy number.

64444880880 is a `hidden beast` number, since 6 + 44 + 448 + 80 + 8 + 80 = 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 pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 254046 + ... + 439805.

It is an arithmetic number, because the mean of its divisors is an integer number (1419621192).

Almost surely, 2^64444880880 is an apocalyptic number.

64444880880 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64444880880 is an abundant number, since it is smaller than the sum of its proper divisors (162694509840).

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

64444880880 is a wasteful number, since it uses less digits than its factorization.

64444880880 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 693916 (or 693904 counting only the distinct ones).

The product of its (nonzero) digits is 6291456, while the sum is 54.

The spelling of 64444880880 in words is "sixty-four billion, four hundred forty-four million, eight hundred eighty thousand, eight hundred eighty".