321643136656105 has 32 divisors (see below), whose sum is σ = 443244263270400. Its totient is φ = 221599032753600.

The previous prime is 321643136655931. The next prime is 321643136656141. The reversal of 321643136656105 is 501656631346123.

It is not a de Polignac number, because 321643136656105 - 2¹¹ = 321643136654057 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 12064656 + ... + 28086334.

It is an arithmetic number, because the mean of its divisors is an integer number (13851383227200).

Almost surely, 2^{321643136656105} is an apocalyptic number.

It is an amenable number.

321643136656105 is a deficient number, since it is larger than the sum of its proper divisors (121601126614295).

321643136656105 is a wasteful number, since it uses less digits than its factorization.

321643136656105 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 16040925.

The product of its (nonzero) digits is 6998400, while the sum is 52.

The spelling of 321643136656105 in words is "three hundred twenty-one trillion, six hundred forty-three billion, one hundred thirty-six million, six hundred fifty-six thousand, one hundred five".