64446818 has 4 divisors (see below), whose sum is σ = 96670230. Its totient is φ = 32223408.

The previous prime is 64446817. The next prime is 64446827. The reversal of 64446818 is 81864446.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 81864446 = 2 ⋅40932223.

It can be written as a sum of positive squares in only one way, i.e., 49182169 + 15264649 = 7013^2 + 3907^2 .

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (64446817) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 16111703 + ... + 16111706.

Almost surely, 2^64446818 is an apocalyptic number.

64446818 is a deficient number, since it is larger than the sum of its proper divisors (32223412).

64446818 is a wasteful number, since it uses less digits than its factorization.

64446818 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 32223411.

The product of its digits is 147456, while the sum is 41.

The square root of 64446818 is about 8027.8775526287. The cubic root of 64446818 is about 400.9287128954.

The spelling of 64446818 in words is "sixty-four million, four hundred forty-six thousand, eight hundred eighteen".