64576646 has 4 divisors (see below), whose sum is σ = 96864972. Its totient is φ = 32288322.

The previous prime is 64576643. The next prime is 64576651. The reversal of 64576646 is 64667546.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 64667546 = 2 ⋅32333773.

It is a junction number, because it is equal to n+sod(n) for n = 64576597 and 64576606.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64576643) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16144160 + ... + 16144163.

It is an arithmetic number, because the mean of its divisors is an integer number (24216243).

Almost surely, 2^64576646 is an apocalyptic number.

64576646 is a deficient number, since it is larger than the sum of its proper divisors (32288326).

64576646 is a wasteful number, since it uses less digits than its factorization.

64576646 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32288325.

The product of its digits is 725760, while the sum is 44.

The square root of 64576646 is about 8035.9595568918. The cubic root of 64576646 is about 401.1977557067.

The spelling of 64576646 in words is "sixty-four million, five hundred seventy-six thousand, six hundred forty-six".