64542408 has 96 divisors (see below), whose sum is σ = 190589760. Its totient is φ = 18157440.

The previous prime is 64542349. The next prime is 64542409. The reversal of 64542408 is 80424546.

It is not an unprimeable number, because it can be changed into a prime (64542409) by changing a digit.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 83110 + ... + 83882.

It is an arithmetic number, because the mean of its divisors is an integer number (1985310).

Almost surely, 2^64542408 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 64542408, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (95294880).

64542408 is an abundant number, since it is smaller than the sum of its proper divisors (126047352).

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

64542408 is a wasteful number, since it uses less digits than its factorization.

64542408 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 867 (or 856 counting only the distinct ones).

The product of its (nonzero) digits is 30720, while the sum is 33.

The square root of 64542408 is about 8033.8289750280. The cubic root of 64542408 is about 401.1268392689.

The spelling of 64542408 in words is "sixty-four million, five hundred forty-two thousand, four hundred eight".