123446644321 has 128 divisors (see below), whose sum is σ = 178502123520. Its totient is φ = 82837877760.

The previous prime is 123446644319. The next prime is 123446644339.

123446644321 is nontrivially palindromic in base 10.

It is not a de Polignac number, because 123446644321 - 2¹ = 123446644319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (123446644351) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 343862340 + ... + 343862698.

It is an arithmetic number, because the mean of its divisors is an integer number (1394547840).

Almost surely, 2^123446644321 is an apocalyptic number.

123446644321 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

123446644321 is a deficient number, since it is larger than the sum of its proper divisors (55055479199).

123446644321 is a wasteful number, since it uses less digits than its factorization.

123446644321 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 596 (or 574 counting only the distinct ones).

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

It can be divided in two parts, 123446 and 644321, that added together give a palindrome (767767).

The spelling of 123446644321 in words is "one hundred twenty-three billion, four hundred forty-six million, six hundred forty-four thousand, three hundred twenty-one".