4001616021 has 8 divisors (see below), whose sum is σ = 5745910240. Its totient is φ = 2462532912.

The previous prime is 4001616013. The next prime is 4001616041. The reversal of 4001616021 is 1206161004.

4001616021 is digitally balanced in base 2 and base 4, because in such bases it contains all the possibile digits an equal number of times.

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

It is not a de Polignac number, because 4001616021 - 2³ = 4001616013 is a prime.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (4001616001) 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, 51302731 + ... + 51302808.

It is an arithmetic number, because the mean of its divisors is an integer number (718238780).

Almost surely, 2^4001616021 is an apocalyptic number.

It is an amenable number.

4001616021 is a deficient number, since it is larger than the sum of its proper divisors (1744294219).

4001616021 is a wasteful number, since it uses less digits than its factorization.

4001616021 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 102605555.

The product of its (nonzero) digits is 288, while the sum is 21.

The square root of 4001616021 is about 63258.3276810255. The cubic root of 4001616021 is about 1587.6147959725.

Adding to 4001616021 its reverse (1206161004), we get a palindrome (5207777025).

The spelling of 4001616021 in words is "four billion, one million, six hundred sixteen thousand, twenty-one".