1441643561 has 8 divisors (see below), whose sum is σ = 1512546048. Its totient is φ = 1372266000.

The previous prime is 1441643527. The next prime is 1441643573. The reversal of 1441643561 is 1653461441.

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 1441643561 - 2¹⁴ = 1441627177 is a prime.

It is not an unprimeable number, because it can be changed into a prime (1441643591) 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, 379295 + ... + 383076.

It is an arithmetic number, because the mean of its divisors is an integer number (189068256).

Almost surely, 2^1441643561 is an apocalyptic number.

It is an amenable number.

1441643561 is a deficient number, since it is larger than the sum of its proper divisors (70902487).

1441643561 is an equidigital number, since it uses as much as digits as its factorization.

1441643561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 762463.

The product of its digits is 34560, while the sum is 35.

The square root of 1441643561 is about 37968.9815639029. The cubic root of 1441643561 is about 1129.6726963407.

The spelling of 1441643561 in words is "one billion, four hundred forty-one million, six hundred forty-three thousand, five hundred sixty-one".