344838216857 has 4 divisors (see below), whose sum is σ = 355962030336. Its totient is φ = 333714403380.

The previous prime is 344838216829. The next prime is 344838216883. The reversal of 344838216857 is 758612838443.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 344838216857 - 2³⁴ = 327658347673 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 344838216796 and 344838216805.

It is not an unprimeable number, because it can be changed into a prime (344838216887) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 5561906693 + ... + 5561906754.

It is an arithmetic number, because the mean of its divisors is an integer number (88990507584).

Almost surely, 2^344838216857 is an apocalyptic number.

It is an amenable number.

344838216857 is a deficient number, since it is larger than the sum of its proper divisors (11123813479).

344838216857 is a wasteful number, since it uses less digits than its factorization.

344838216857 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 11123813478.

The product of its digits is 30965760, while the sum is 59.

The spelling of 344838216857 in words is "three hundred forty-four billion, eight hundred thirty-eight million, two hundred sixteen thousand, eight hundred fifty-seven".