64516560 has 40 divisors (see below), whose sum is σ = 200002080. Its totient is φ = 17204352.

The previous prime is 64516537. The next prime is 64516577. The reversal of 64516560 is 6561546.

64516560 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a tau number, because it is divible by the number of its divisors (40).

It is a congruent number.

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, 134170 + ... + 134649.

It is an arithmetic number, because the mean of its divisors is an integer number (5000052).

Almost surely, 2^64516560 is an apocalyptic number.

64516560 is a gapful number since it is divisible by the number (60) formed by its first and last digit.

It is an amenable number.

64516560 is an abundant number, since it is smaller than the sum of its proper divisors (135485520).

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

64516560 is a wasteful number, since it uses less digits than its factorization.

64516560 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 268835 (or 268829 counting only the distinct ones).

The product of its (nonzero) digits is 21600, while the sum is 33.

The square root of 64516560 is about 8032.2201165058. The cubic root of 64516560 is about 401.0732842433.

It can be divided in two parts, 645 and 16560, that added together give a triangular number (17205 = T₁₈₅).

The spelling of 64516560 in words is "sixty-four million, five hundred sixteen thousand, five hundred sixty".