5441643721 has 8 divisors (see below), whose sum is σ = 5537460320. Its totient is φ = 5346256608.

The previous prime is 5441643673. The next prime is 5441643743. The reversal of 5441643721 is 1273461445.

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 5441643721 - 2¹⁷ = 5441512649 is a prime.

It is a super-2 number, since 2×5441643721² = 59222972772597451682, which contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (5441643121) 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, 81756 + ... + 132541.

It is an arithmetic number, because the mean of its divisors is an integer number (692182540).

Almost surely, 2^5441643721 is an apocalyptic number.

It is an amenable number.

5441643721 is a deficient number, since it is larger than the sum of its proper divisors (95816599).

5441643721 is a wasteful number, since it uses less digits than its factorization.

5441643721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 214743.

The product of its digits is 80640, while the sum is 37.

The square root of 5441643721 is about 73767.4977276578. The cubic root of 5441643721 is about 1758.9089873309.

The spelling of 5441643721 in words is "five billion, four hundred forty-one million, six hundred forty-three thousand, seven hundred twenty-one".