64627505 has 4 divisors (see below), whose sum is σ = 77553012. Its totient is φ = 51702000.

The previous prime is 64627469. The next prime is 64627513. The reversal of 64627505 is 50572646.

64627505 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 50572646 = 2 ⋅25286323.

It can be written as a sum of positive squares in 2 ways, for example, as 27952369 + 36675136 = 5287^2 + 6056^2 .

It is not a de Polignac number, because 64627505 - 2⁶ = 64627441 is a prime.

It is a Duffinian number.

It is a Curzon 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 3 ways as a sum of consecutive naturals, for example, 6462746 + ... + 6462755.

It is an arithmetic number, because the mean of its divisors is an integer number (19388253).

Almost surely, 2^64627505 is an apocalyptic number.

It is an amenable number.

64627505 is a deficient number, since it is larger than the sum of its proper divisors (12925507).

64627505 is a wasteful number, since it uses less digits than its factorization.

64627505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 12925506.

The product of its (nonzero) digits is 50400, while the sum is 35.

The square root of 64627505 is about 8039.1233974856. The cubic root of 64627505 is about 401.3030526087.

The spelling of 64627505 in words is "sixty-four million, six hundred twenty-seven thousand, five hundred five".