2643359812405 has 8 divisors (see below), whose sum is σ = 3416034219192. Its totient is φ = 1952019553728.

The previous prime is 2643359812363. The next prime is 2643359812417. The reversal of 2643359812405 is 5042189533462.

It can be written as a sum of positive squares in 4 ways, for example, as 292160789361 + 2351199023044 = 540519^2 + 1533362^2 .

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 2643359812405 - 2¹⁵ = 2643359779637 is a prime.

It is a Duffinian number.

It is a congruent number.

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, 20333536954 + ... + 20333537083.

It is an arithmetic number, because the mean of its divisors is an integer number (427004277399).

Almost surely, 2^{2643359812405} is an apocalyptic number.

It is an amenable number.

2643359812405 is a deficient number, since it is larger than the sum of its proper divisors (772674406787).

2643359812405 is a wasteful number, since it uses less digits than its factorization.

2643359812405 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40667074055.

The product of its (nonzero) digits is 6220800, while the sum is 52.

The spelling of 2643359812405 in words is "two trillion, six hundred forty-three billion, three hundred fifty-nine million, eight hundred twelve thousand, four hundred five".