4451664416 has 12 divisors (see below), whose sum is σ = 8764214382. Its totient is φ = 2225832192.

The previous prime is 4451664407. The next prime is 4451664419. The reversal of 4451664416 is 6144661544.

It can be written as a sum of positive squares in only one way, i.e., 3733210000 + 718454416 = 61100^2 + 26804^2 .

It is not an unprimeable number, because it can be changed into a prime (4451664419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 69557225 + ... + 69557288.

Almost surely, 2^4451664416 is an apocalyptic number.

It is an amenable number.

4451664416 is a deficient number, since it is larger than the sum of its proper divisors (4312549966).

4451664416 is a wasteful number, since it uses less digits than its factorization.

4451664416 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 139114523 (or 139114515 counting only the distinct ones).

The product of its digits is 276480, while the sum is 41.

The square root of 4451664416 is about 66720.7944796823. The cubic root of 4451664416 is about 1645.0312002779.

The spelling of 4451664416 in words is "four billion, four hundred fifty-one million, six hundred sixty-four thousand, four hundred sixteen".