345354853561 has 3 divisors (see below), whose sum is σ = 345355441231. Its totient is φ = 345354265892.

The previous prime is 345354853489. The next prime is 345354853583. The reversal of 345354853561 is 165358453543.

The square root of 345354853561 is 587669.

It is a perfect power (a square), and thus also a powerful number.

It is a semiprime because it is the product of two primes, and also a brilliant number, because the two primes have the same length.

It can be written as a sum of positive squares in only one way, i.e., 51265563561 + 294089290000 = 226419^2 + 542300^2 .

It is not a de Polignac number, because 345354853561 - 2¹⁹ = 345354329273 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 345354853499 and 345354853508.

It is not an unprimeable number, because it can be changed into a prime (345354853661) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 2 ways as a sum of consecutive naturals, for example, 293835 + ... + 881503.

Almost surely, 2^345354853561 is an apocalyptic number.

345354853561 is the 587669-th square number.

345354853561 is the 293835-th centered octagonal number.

It is an amenable number.

345354853561 is a deficient number, since it is larger than the sum of its proper divisors (587670).

345354853561 is an frugal number, since it uses more digits than its factorization.

345354853561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1175338 (or 587669 counting only the distinct ones).

The product of its digits is 12960000, while the sum is 52.

The spelling of 345354853561 in words is "three hundred forty-five billion, three hundred fifty-four million, eight hundred fifty-three thousand, five hundred sixty-one".