838201605643 has 4 divisors (see below), whose sum is σ = 838281346168. Its totient is φ = 838121865120.

The previous prime is 838201605509. The next prime is 838201605649. The reversal of 838201605643 is 346506102838.

838201605643 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 838201605643 - 2¹⁷ = 838201474571 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 838201605593 and 838201605602.

It is not an unprimeable number, because it can be changed into a prime (838201605649) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 39854493 + ... + 39875518.

It is an arithmetic number, because the mean of its divisors is an integer number (209570336542).

Almost surely, 2^838201605643 is an apocalyptic number.

838201605643 is a deficient number, since it is larger than the sum of its proper divisors (79740525).

838201605643 is a wasteful number, since it uses less digits than its factorization.

838201605643 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 79740524.

The product of its (nonzero) digits is 829440, while the sum is 46.

The spelling of 838201605643 in words is "eight hundred thirty-eight billion, two hundred one million, six hundred five thousand, six hundred forty-three".