4421643961 has 8 divisors (see below), whose sum is σ = 5054527424. Its totient is φ = 3789065520.

The previous prime is 4421643959. The next prime is 4421643997. The reversal of 4421643961 is 1693461244.

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 4421643961 - 2¹ = 4421643959 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (4421643661) 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, 44295 + ... + 103948.

It is an arithmetic number, because the mean of its divisors is an integer number (631815928).

Almost surely, 2^4421643961 is an apocalyptic number.

It is an amenable number.

4421643961 is a deficient number, since it is larger than the sum of its proper divisors (632883463).

4421643961 is a wasteful number, since it uses less digits than its factorization.

4421643961 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 152511.

The product of its digits is 124416, while the sum is 40.

The square root of 4421643961 is about 66495.4431596632. The cubic root of 4421643961 is about 1641.3250199210.

The spelling of 4421643961 in words is "four billion, four hundred twenty-one million, six hundred forty-three thousand, nine hundred sixty-one".