643450534115 has 8 divisors (see below), whose sum is σ = 812779622160. Its totient is φ = 487667773152.

The previous prime is 643450534093. The next prime is 643450534127. The reversal of 643450534115 is 511435054346.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-643450534115 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3386581664 + ... + 3386581853.

It is an arithmetic number, because the mean of its divisors is an integer number (101597452770).

Almost surely, 2^643450534115 is an apocalyptic number.

643450534115 is a deficient number, since it is larger than the sum of its proper divisors (169329088045).

643450534115 is a wasteful number, since it uses less digits than its factorization.

643450534115 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6773163541.

The product of its (nonzero) digits is 432000, while the sum is 41.

The spelling of 643450534115 in words is "six hundred forty-three billion, four hundred fifty million, five hundred thirty-four thousand, one hundred fifteen".