64640548 has 24 divisors (see below), whose sum is σ = 129673152. Its totient is φ = 27619104.

The previous prime is 64640539. The next prime is 64640581. The reversal of 64640548 is 84504646.

64640548 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 6390 + ... + 13042.

It is an arithmetic number, because the mean of its divisors is an integer number (5403048).

Almost surely, 2^64640548 is an apocalyptic number.

It is an amenable number.

64640548 is an abundant number, since it is smaller than the sum of its proper divisors (65032604).

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

64640548 is a wasteful number, since it uses less digits than its factorization.

64640548 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7011 (or 7009 counting only the distinct ones).

The product of its (nonzero) digits is 92160, while the sum is 37.

The square root of 64640548 is about 8039.9345768482. The cubic root of 64640548 is about 401.3300475321.

The spelling of 64640548 in words is "sixty-four million, six hundred forty thousand, five hundred forty-eight".