1644141323 has 4 divisors (see below), whose sum is σ = 1793608728. Its totient is φ = 1494673920.

The previous prime is 1644141277. The next prime is 1644141337. The reversal of 1644141323 is 3231414461.

It is a happy number.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-1644141323 is a prime.

It is a super-3 number, since 3×1644141323³ (a number of 29 digits) contains 333 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (1644141353) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 74733686 + ... + 74733707.

It is an arithmetic number, because the mean of its divisors is an integer number (448402182).

Almost surely, 2^1644141323 is an apocalyptic number.

1644141323 is a deficient number, since it is larger than the sum of its proper divisors (149467405).

1644141323 is a wasteful number, since it uses less digits than its factorization.

1644141323 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 149467404.

The product of its digits is 6912, while the sum is 29.

The square root of 1644141323 is about 40548.0125653527. The cubic root of 1644141323 is about 1180.2655064239.

Adding to 1644141323 its reverse (3231414461), we get a palindrome (4875555784).

The spelling of 1644141323 in words is "one billion, six hundred forty-four million, one hundred forty-one thousand, three hundred twenty-three".