4491680399 has 8 divisors (see below), whose sum is σ = 4648645920. Its totient is φ = 4334853600.

The previous prime is 4491680387. The next prime is 4491680423. The reversal of 4491680399 is 9930861944.

It is a Cunningham number, because it is equal to 67020²-1.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 4491680399 - 2²⁰ = 4490631823 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 4491680399.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4491680309) 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, 33509 + ... + 100529.

It is an arithmetic number, because the mean of its divisors is an integer number (581080740).

Almost surely, 2^4491680399 is an apocalyptic number.

4491680399 is a deficient number, since it is larger than the sum of its proper divisors (156965521).

4491680399 is a wasteful number, since it uses less digits than its factorization.

4491680399 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 69361.

The product of its (nonzero) digits is 1679616, while the sum is 53.

The square root of 4491680399 is about 67019.9999925395. Note that the first 5 decimals coincide. The cubic root of 4491680399 is about 1649.9455628199.

The spelling of 4491680399 in words is "four billion, four hundred ninety-one million, six hundred eighty thousand, three hundred ninety-nine".