1444141561 has 4 divisors (see below), whose sum is σ = 1483172452. Its totient is φ = 1405110672.

The previous prime is 1444141519. The next prime is 1444141577. The reversal of 1444141561 is 1651414441.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 637865536 + 806276025 = 25256^2 + 28395^2 .

It is a cyclic number.

It is not a de Polignac number, because 1444141561 - 2²³ = 1435752953 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1444141861) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 19515390 + ... + 19515463.

It is an arithmetic number, because the mean of its divisors is an integer number (370793113).

Almost surely, 2^1444141561 is an apocalyptic number.

It is an amenable number.

1444141561 is a deficient number, since it is larger than the sum of its proper divisors (39030891).

1444141561 is an equidigital number, since it uses as much as digits as its factorization.

1444141561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 39030890.

The product of its digits is 7680, while the sum is 31.

The square root of 1444141561 is about 38001.8625990885. The cubic root of 1444141561 is about 1130.3247979070.

The spelling of 1444141561 in words is "one billion, four hundred forty-four million, one hundred forty-one thousand, five hundred sixty-one".