64618 has 4 divisors (see below), whose sum is σ = 96930. Its totient is φ = 32308.

The previous prime is 64613. The next prime is 64621. The reversal of 64618 is 81646.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81646 = 2 ⋅40823.

It can be written as a sum of positive squares in only one way, i.e., 41209 + 23409 = 203^2 + 153^2 .

It is a junction number, because it is equal to n+sod(n) for n = 64592 and 64601.

It is not an unprimeable number, because it can be changed into a prime (64613) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16153 + ... + 16156.

2⁶⁴⁶¹⁸ is an apocalyptic number.

64618 is a deficient number, since it is larger than the sum of its proper divisors (32312).

64618 is a wasteful number, since it uses less digits than its factorization.

64618 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32311.

The product of its digits is 1152, while the sum is 25.

The square root of 64618 is about 254.2007081029. The cubic root of 64618 is about 40.1283377949.

It can be divided in two parts, 646 and 18, that multiplied together give a triangular number (11628 = T₁₅₂).

The spelling of 64618 in words is "sixty-four thousand, six hundred eighteen".