4494193664 has 22 divisors (see below), whose sum is σ = 8984000514. Its totient is φ = 2247096320.

The previous prime is 4494193663. The next prime is 4494193687. The reversal of 4494193664 is 4663914944.

It can be written as a sum of positive squares in only one way, i.e., 2400216064 + 2093977600 = 48992^2 + 45760^2 .

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4494193663) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2193407 + ... + 2195454.

Almost surely, 2^4494193664 is an apocalyptic number.

It is an amenable number.

4494193664 is a deficient number, since it is larger than the sum of its proper divisors (4489806850).

4494193664 is an equidigital number, since it uses as much as digits as its factorization.

4494193664 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4388881 (or 4388863 counting only the distinct ones).

The product of its digits is 2239488, while the sum is 50.

The square root of 4494193664 is about 67038.7474823329. The cubic root of 4494193664 is about 1650.2532410817.

The spelling of 4494193664 in words is "four billion, four hundred ninety-four million, one hundred ninety-three thousand, six hundred sixty-four".