643085014399 has 4 divisors (see below), whose sum is σ = 652683298264. Its totient is φ = 633486730536.

The previous prime is 643085014321. The next prime is 643085014469. The reversal of 643085014399 is 993410580346.

It is a happy number.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 643085014399 - 2¹⁵ = 643084981631 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643085014499) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4799141832 + ... + 4799141965.

It is an arithmetic number, because the mean of its divisors is an integer number (163170824566).

Almost surely, 2^643085014399 is an apocalyptic number.

643085014399 is a deficient number, since it is larger than the sum of its proper divisors (9598283865).

643085014399 is an equidigital number, since it uses as much as digits as its factorization.

643085014399 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 9598283864.

The product of its (nonzero) digits is 2799360, while the sum is 52.

The spelling of 643085014399 in words is "six hundred forty-three billion, eighty-five million, fourteen thousand, three hundred ninety-nine".