643343601322132 has 6 divisors (see below), whose sum is σ = 1125851302313738. Its totient is φ = 321671800661064.

The previous prime is 643343601322129. The next prime is 643343601322217. The reversal of 643343601322132 is 231223106343346.

It can be written as a sum of positive squares in only one way, i.e., 393073289557776 + 250270311764356 = 19826076^2 + 15819934^2 .

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 80417950165263 + ... + 80417950165270.

Almost surely, 2^{643343601322132} is an apocalyptic number.

It is an amenable number.

643343601322132 is a deficient number, since it is larger than the sum of its proper divisors (482507700991606).

643343601322132 is a wasteful number, since it uses less digits than its factorization.

643343601322132 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 160835900330537 (or 160835900330535 counting only the distinct ones).

The product of its (nonzero) digits is 1119744, while the sum is 43.

Adding to 643343601322132 its reverse (231223106343346), we get a palindrome (874566707665478).

The spelling of 643343601322132 in words is "six hundred forty-three trillion, three hundred forty-three billion, six hundred one million, three hundred twenty-two thousand, one hundred thirty-two".