643364026315 has 4 divisors (see below), whose sum is σ = 772036831584. Its totient is φ = 514691221048.

The previous prime is 643364026303. The next prime is 643364026363. The reversal of 643364026315 is 513620463346.

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 643364026315 - 2²⁷ = 643229808587 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 64336402627 + ... + 64336402636.

It is an arithmetic number, because the mean of its divisors is an integer number (193009207896).

Almost surely, 2^643364026315 is an apocalyptic number.

643364026315 is a deficient number, since it is larger than the sum of its proper divisors (128672805269).

643364026315 is a wasteful number, since it uses less digits than its factorization.

643364026315 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 128672805268.

The product of its (nonzero) digits is 933120, while the sum is 43.

The spelling of 643364026315 in words is "six hundred forty-three billion, three hundred sixty-four million, twenty-six thousand, three hundred fifteen".