838743815345 has 4 divisors (see below), whose sum is σ = 1006492578420. Its totient is φ = 670995052272.

The previous prime is 838743815323. The next prime is 838743815353. The reversal of 838743815345 is 543518347838.

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 129562562704 + 709181252641 = 359948^2 + 842129^2 .

It is a cyclic number.

It is not a de Polignac number, because 838743815345 - 2³² = 834448848049 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, 83874381530 + ... + 83874381539.

It is an arithmetic number, because the mean of its divisors is an integer number (251623144605).

Almost surely, 2^838743815345 is an apocalyptic number.

It is an amenable number.

838743815345 is a deficient number, since it is larger than the sum of its proper divisors (167748763075).

838743815345 is a wasteful number, since it uses less digits than its factorization.

838743815345 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 167748763074.

The product of its digits is 38707200, while the sum is 59.

The spelling of 838743815345 in words is "eight hundred thirty-eight billion, seven hundred forty-three million, eight hundred fifteen thousand, three hundred forty-five".