64744416 has 144 divisors (see below), whose sum is σ = 203793408. Its totient is φ = 19334400.

The previous prime is 64744411. The next prime is 64744489. The reversal of 64744416 is 61444746.

64744416 is a `hidden beast` number, since 647 + 4 + 4 + 4 + 1 + 6 = 666.

It is a tau number, because it is divible by the number of its divisors (144).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64744411) 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 23 ways as a sum of consecutive naturals, for example, 338881 + ... + 339071.

It is an arithmetic number, because the mean of its divisors is an integer number (1415232).

Almost surely, 2^64744416 is an apocalyptic number.

64744416 is a gapful number since it is divisible by the number (66) 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 64744416, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (101896704).

64744416 is an abundant number, since it is smaller than the sum of its proper divisors (139048992).

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

64744416 is a wasteful number, since it uses less digits than its factorization.

64744416 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 325 (or 314 counting only the distinct ones).

The product of its digits is 64512, while the sum is 36.

The square root of 64744416 is about 8046.3914893572. The cubic root of 64744416 is about 401.5448922548.

The spelling of 64744416 in words is "sixty-four million, seven hundred forty-four thousand, four hundred sixteen".