2661444423 has 24 divisors (see below), whose sum is σ = 4196524800. Its totient is φ = 1611945360.

The previous prime is 2661444413. The next prime is 2661444427. The reversal of 2661444423 is 3244441662.

It is not a de Polignac number, because 2661444423 - 2²⁰ = 2660395847 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (2661444427) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 160290 + ... + 176112.

It is an arithmetic number, because the mean of its divisors is an integer number (174855200).

Almost surely, 2^2661444423 is an apocalyptic number.

2661444423 is a deficient number, since it is larger than the sum of its proper divisors (1535080377).

2661444423 is a wasteful number, since it uses less digits than its factorization.

2661444423 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17539 (or 17536 counting only the distinct ones).

The product of its digits is 110592, while the sum is 36.

The square root of 2661444423 is about 51589.1890128155. The cubic root of 2661444423 is about 1385.8167317632.

The spelling of 2661444423 in words is "two billion, six hundred sixty-one million, four hundred forty-four thousand, four hundred twenty-three".