643036010345 has 4 divisors (see below), whose sum is σ = 771643212420. Its totient is φ = 514428808272.

The previous prime is 643036010263. The next prime is 643036010359. The reversal of 643036010345 is 543010630346.

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

It can be written as a sum of positive squares in 2 ways, for example, as 407081004841 + 235955005504 = 638029^2 + 485752^2 .

It is a cyclic number.

It is not a de Polignac number, because 643036010345 - 2²⁰ = 643034961769 is a prime.

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, 64303601030 + ... + 64303601039.

It is an arithmetic number, because the mean of its divisors is an integer number (192910803105).

Almost surely, 2^643036010345 is an apocalyptic number.

It is an amenable number.

643036010345 is a deficient number, since it is larger than the sum of its proper divisors (128607202075).

643036010345 is a wasteful number, since it uses less digits than its factorization.

643036010345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 128607202074.

The product of its (nonzero) digits is 77760, while the sum is 35.

The spelling of 643036010345 in words is "six hundred forty-three billion, thirty-six million, ten thousand, three hundred forty-five".