4018442641 has 8 divisors (see below), whose sum is σ = 4028215464. Its totient is φ = 4008681600.

The previous prime is 4018442599. The next prime is 4018442651. The reversal of 4018442641 is 1462448104.

It can be written as a sum of positive squares in 4 ways, for example, as 196112016 + 3822330625 = 14004^2 + 61825^2 .

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 4018442641 - 2²⁵ = 3984888209 is a prime.

It is a super-2 number, since 2×4018442641² = 32295762518014109762, which contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 4018442597 and 4018442606.

It is not an unprimeable number, because it can be changed into a prime (4018442651) 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, 1215691 + ... + 1218991.

It is an arithmetic number, because the mean of its divisors is an integer number (503526933).

Almost surely, 2^4018442641 is an apocalyptic number.

It is an amenable number.

4018442641 is a deficient number, since it is larger than the sum of its proper divisors (9772823).

4018442641 is a wasteful number, since it uses less digits than its factorization.

4018442641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5891.

The product of its (nonzero) digits is 24576, while the sum is 34.

The square root of 4018442641 is about 63391.1874080301. The cubic root of 4018442641 is about 1589.8369677122.

The spelling of 4018442641 in words is "four billion, eighteen million, four hundred forty-two thousand, six hundred forty-one".