64244266064 has 80 divisors (see below), whose sum is σ = 137393777664. Its totient is φ = 28858368000.

The previous prime is 64244266063. The next prime is 64244266067. The reversal of 64244266064 is 46066244246.

It is a Harshad number since it is a multiple of its sum of digits (44).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64244266061) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 7015889 + ... + 7025039.

Almost surely, 2^64244266064 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 64244266064, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (68696888832).

64244266064 is an abundant number, since it is smaller than the sum of its proper divisors (73149511600).

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

64244266064 is a wasteful number, since it uses less digits than its factorization.

64244266064 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9636 (or 9630 counting only the distinct ones).

The product of its (nonzero) digits is 1327104, while the sum is 44.

The spelling of 64244266064 in words is "sixty-four billion, two hundred forty-four million, two hundred sixty-six thousand, sixty-four".