1443581942561 has 8 divisors (see below), whose sum is σ = 1577156667744. Its totient is φ = 1310397217920.

The previous prime is 1443581942513. The next prime is 1443581942669. The reversal of 1443581942561 is 1652491853441.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1443581942561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1443581941561) 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, 97492391 + ... + 97507196.

It is an arithmetic number, because the mean of its divisors is an integer number (197144583468).

Almost surely, 2^{1443581942561} is an apocalyptic number.

1443581942561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

1443581942561 is a deficient number, since it is larger than the sum of its proper divisors (133574725183).

1443581942561 is a wasteful number, since it uses less digits than its factorization.

1443581942561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 195000271.

The product of its digits is 4147200, while the sum is 53.

The spelling of 1443581942561 in words is "one trillion, four hundred forty-three billion, five hundred eighty-one million, nine hundred forty-two thousand, five hundred sixty-one".