643465404101 has 8 divisors (see below), whose sum is σ = 692996478720. Its totient is φ = 593939148912.

The previous prime is 643465404067. The next prime is 643465404157. The reversal of 643465404101 is 101404564346.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 643465404101 - 2¹⁴ = 643465387717 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643465404181) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 925145 + ... + 1463838.

It is an arithmetic number, because the mean of its divisors is an integer number (86624559840).

Almost surely, 2^643465404101 is an apocalyptic number.

It is an amenable number.

643465404101 is a deficient number, since it is larger than the sum of its proper divisors (49531074619).

643465404101 is a wasteful number, since it uses less digits than its factorization.

643465404101 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2409715.

The product of its (nonzero) digits is 138240, while the sum is 38.

Adding to 643465404101 its reverse (101404564346), we get a palindrome (744869968447).

The spelling of 643465404101 in words is "six hundred forty-three billion, four hundred sixty-five million, four hundred four thousand, one hundred one".