64545408 has 96 divisors (see below), whose sum is σ = 190201440. Its totient is φ = 20998656.

The previous prime is 64545389. The next prime is 64545409. The reversal of 64545408 is 80454546.

64545408 is a `hidden beast` number, since 64 + 54 + 540 + 8 = 666.

It is a tau number, because it is divible by the number of its divisors (96).

It is a super-2 number, since 2×64545408² = 8332219387772928, which contains 22 as substring.

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

It is not an unprimeable number, because it can be changed into a prime (64545409) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 48885 + ... + 50187.

It is an arithmetic number, because the mean of its divisors is an integer number (1981265).

Almost surely, 2^64545408 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 64545408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95100720).

64545408 is an abundant number, since it is smaller than the sum of its proper divisors (125656032).

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

64545408 is a wasteful number, since it uses less digits than its factorization.

64545408 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1366 (or 1351 counting only the distinct ones).

The product of its (nonzero) digits is 76800, while the sum is 36.

The square root of 64545408 is about 8034.0156833305. The cubic root of 64545408 is about 401.1330541072.

The spelling of 64545408 in words is "sixty-four million, five hundred forty-five thousand, four hundred eight".