643789479107 has 8 divisors (see below), whose sum is σ = 658261639392. Its totient is φ = 629443713600.

The previous prime is 643789479089. The next prime is 643789479139. The reversal of 643789479107 is 701974987346.

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 643789479107 - 2³⁶ = 575070002371 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (643789479187) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 31588394 + ... + 31608767.

It is an arithmetic number, because the mean of its divisors is an integer number (82282704924).

Almost surely, 2^643789479107 is an apocalyptic number.

643789479107 is a deficient number, since it is larger than the sum of its proper divisors (14472160285).

643789479107 is a wasteful number, since it uses less digits than its factorization.

643789479107 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 63197389.

The product of its (nonzero) digits is 64012032, while the sum is 65.

The spelling of 643789479107 in words is "six hundred forty-three billion, seven hundred eighty-nine million, four hundred seventy-nine thousand, one hundred seven".