4167649721 has 8 divisors (see below), whose sum is σ = 4181064000. Its totient is φ = 4154258160.

The previous prime is 4167649699. The next prime is 4167649723. The reversal of 4167649721 is 1279467614.

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 4167649721 - 2³⁰ = 3093907897 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4167649723) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 408875 + ... + 418943.

It is an arithmetic number, because the mean of its divisors is an integer number (522633000).

Almost surely, 2^4167649721 is an apocalyptic number.

It is an amenable number.

4167649721 is a deficient number, since it is larger than the sum of its proper divisors (13414279).

4167649721 is a wasteful number, since it uses less digits than its factorization.

4167649721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11359.

The product of its digits is 508032, while the sum is 47.

The square root of 4167649721 is about 64557.3366938259. The cubic root of 4167649721 is about 1609.2755148613.

The spelling of 4167649721 in words is "four billion, one hundred sixty-seven million, six hundred forty-nine thousand, seven hundred twenty-one".