64520423 has 16 divisors (see below), whose sum is σ = 75315744. Its totient is φ = 54620160.

The previous prime is 64520419. The next prime is 64520431. The reversal of 64520423 is 32402546.

64520423 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 64520423 - 2² = 64520419 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 64520392 and 64520401.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64520473) by changing a digit.

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 15 ways as a sum of consecutive naturals, for example, 16361 + ... + 19917.

It is an arithmetic number, because the mean of its divisors is an integer number (4707234).

Almost surely, 2^64520423 is an apocalyptic number.

64520423 is a deficient number, since it is larger than the sum of its proper divisors (10795321).

64520423 is a wasteful number, since it uses less digits than its factorization.

64520423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3682.

The product of its (nonzero) digits is 5760, while the sum is 26.

The square root of 64520423 is about 8032.4605819139. The cubic root of 64520423 is about 401.0812889849.

Adding to 64520423 its reverse (32402546), we get a palindrome (96922969).

The spelling of 64520423 in words is "sixty-four million, five hundred twenty thousand, four hundred twenty-three".