643441127414 has 4 divisors (see below), whose sum is σ = 965161691124. Its totient is φ = 321720563706.

The previous prime is 643441127389. The next prime is 643441127419. The reversal of 643441127414 is 414721144346.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (643441127419) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 160860281852 + ... + 160860281855.

It is an arithmetic number, because the mean of its divisors is an integer number (241290422781).

Almost surely, 2^643441127414 is an apocalyptic number.

643441127414 is a deficient number, since it is larger than the sum of its proper divisors (321720563710).

643441127414 is a wasteful number, since it uses less digits than its factorization.

643441127414 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321720563709.

The product of its digits is 258048, while the sum is 41.

The spelling of 643441127414 in words is "six hundred forty-three billion, four hundred forty-one million, one hundred twenty-seven thousand, four hundred fourteen".