349203316561 has 4 divisors (see below), whose sum is σ = 380949072624. Its totient is φ = 317457560500.

The previous prime is 349203316559. The next prime is 349203316597. The reversal of 349203316561 is 165613302943.

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 349203316561 - 2¹ = 349203316559 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (349203316531) 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, 15872878015 + ... + 15872878036.

It is an arithmetic number, because the mean of its divisors is an integer number (95237268156).

Almost surely, 2^349203316561 is an apocalyptic number.

It is an amenable number.

349203316561 is a deficient number, since it is larger than the sum of its proper divisors (31745756063).

349203316561 is a wasteful number, since it uses less digits than its factorization.

349203316561 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 31745756062.

The product of its (nonzero) digits is 349920, while the sum is 43.

The spelling of 349203316561 in words is "three hundred forty-nine billion, two hundred three million, three hundred sixteen thousand, five hundred sixty-one".