643075672050337 has 8 divisors (see below), whose sum is σ = 643130613753320. Its totient is φ = 643020732731520.

The previous prime is 643075672050269. The next prime is 643075672050341. The reversal of 643075672050337 is 733050276570346.

It can be written as a sum of positive squares in 4 ways, for example, as 433195288462336 + 209880383588001 = 20813344^2 + 14487249^2 .

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 643075672050337 - 2⁴⁷ = 502338183695009 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643075672050367) 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, 561275383 + ... + 562419955.

It is an arithmetic number, because the mean of its divisors is an integer number (80391326719165).

Almost surely, 2^{643075672050337} is an apocalyptic number.

It is an amenable number.

643075672050337 is a deficient number, since it is larger than the sum of its proper divisors (54941702983).

643075672050337 is a wasteful number, since it uses less digits than its factorization.

643075672050337 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1192083.

The product of its (nonzero) digits is 66679200, while the sum is 58.

The spelling of 643075672050337 in words is "six hundred forty-three trillion, seventy-five billion, six hundred seventy-two million, fifty thousand, three hundred thirty-seven".