64744568 has 64 divisors (see below), whose sum is σ = 150128640. Its totient is φ = 25542144.

The previous prime is 64744567. The next prime is 64744577. The reversal of 64744568 is 86544746.

It is a hoax number, since the sum of its digits (44) coincides with the sum of the digits of its distinct prime factors.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64744567) 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, 44021 + ... + 45467.

It is an arithmetic number, because the mean of its divisors is an integer number (2345760).

Almost surely, 2^64744568 is an apocalyptic number.

64744568 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 64744568, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (75064320).

64744568 is an abundant number, since it is smaller than the sum of its proper divisors (85384072).

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

64744568 is a wasteful number, since it uses less digits than its factorization.

64744568 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1524 (or 1520 counting only the distinct ones).

The product of its digits is 645120, while the sum is 44.

The square root of 64744568 is about 8046.4009345794. The cubic root of 64744568 is about 401.5452064893.

The spelling of 64744568 in words is "sixty-four million, seven hundred forty-four thousand, five hundred sixty-eight".