1644230324461 has 4 divisors (see below), whose sum is σ = 1644428743552. Its totient is φ = 1644031905372.

The previous prime is 1644230324453. The next prime is 1644230324491.

1644230324461 is nontrivially palindromic in base 10.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 1644230324461 - 2³ = 1644230324453 is a prime.

It is a super-3 number, since 3×1644230324461³ (a number of 38 digits) contains 333 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (1644230324491) 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, 99197115 + ... + 99213688.

It is an arithmetic number, because the mean of its divisors is an integer number (411107185888).

Almost surely, 2^{1644230324461} is an apocalyptic number.

It is an amenable number.

1644230324461 is a deficient number, since it is larger than the sum of its proper divisors (198419091).

1644230324461 is an equidigital number, since it uses as much as digits as its factorization.

1644230324461 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 198419090.

The product of its (nonzero) digits is 331776, while the sum is 40.

It can be divided in two parts, 1644230 and 324461, that added together give a palindrome (1968691).

The spelling of 1644230324461 in words is "one trillion, six hundred forty-four billion, two hundred thirty million, three hundred twenty-four thousand, four hundred sixty-one".