4489496721 has 6 divisors (see below), whose sum is σ = 6484828610. Its totient is φ = 2992997808.

The previous prime is 4489496701. The next prime is 4489496723. The reversal of 4489496721 is 1276949844.

4489496721 is a `hidden beast` number, since 4 + 4 + 89 + 496 + 72 + 1 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4419590400 + 69906321 = 66480^2 + 8361^2 .

It is not a de Polignac number, because 4489496721 - 2⁵ = 4489496689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4489496723) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 249416476 + ... + 249416493.

Almost surely, 2^4489496721 is an apocalyptic number.

It is an amenable number.

4489496721 is a deficient number, since it is larger than the sum of its proper divisors (1995331889).

4489496721 is a wasteful number, since it uses less digits than its factorization.

4489496721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 498832975 (or 498832972 counting only the distinct ones).

The product of its digits is 3483648, while the sum is 54.

The square root of 4489496721 is about 67003.7067705959. The cubic root of 4489496721 is about 1649.6781399747.

The spelling of 4489496721 in words is "four billion, four hundred eighty-nine million, four hundred ninety-six thousand, seven hundred twenty-one".