64447674446 has 16 divisors (see below), whose sum is σ = 101438179200. Its totient is φ = 30650602488.

The previous prime is 64447674427. The next prime is 64447674449.

It is a happy number.

64447674446 is nontrivially palindromic in base 10.

It is a Curzon number.

It is a junction number, because it is equal to n+sod(n) for n = 64447674391 and 64447674400.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (64447674449) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3905276 + ... + 3921743.

It is an arithmetic number, because the mean of its divisors is an integer number (6339886200).

Almost surely, 2^64447674446 is an apocalyptic number.

64447674446 is a deficient number, since it is larger than the sum of its proper divisors (36990504754).

64447674446 is a wasteful number, since it uses less digits than its factorization.

64447674446 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7827223.

The product of its digits is 43352064, while the sum is 56.

The spelling of 64447674446 in words is "sixty-four billion, four hundred forty-seven million, six hundred seventy-four thousand, four hundred forty-six".