64611646 has 16 divisors (see below), whose sum is σ = 110325888. Its totient is φ = 28091800.

The previous prime is 64611593. The next prime is 64611649.

64611646 is nontrivially palindromic in base 10.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64611649) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 63340 + ... + 64351.

It is an arithmetic number, because the mean of its divisors is an integer number (6895368).

Almost surely, 2^64611646 is an apocalyptic number.

64611646 is a deficient number, since it is larger than the sum of its proper divisors (45714242).

64611646 is a wasteful number, since it uses less digits than its factorization.

64611646 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 127727.

The product of its digits is 20736, while the sum is 34.

The square root of 64611646 is about 8038.1369732047. The cubic root of 64611646 is about 401.2702245542.

The spelling of 64611646 in words is "sixty-four million, six hundred eleven thousand, six hundred forty-six".