343556256661 has 8 divisors (see below), whose sum is σ = 347207808600. Its totient is φ = 339922649088.

The previous prime is 343556256653. The next prime is 343556256679. The reversal of 343556256661 is 166652655343.

It can be written as a sum of positive squares in 4 ways, for example, as 164791343025 + 178764913636 = 405945^2 + 422806^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 343556256661 - 2³ = 343556256653 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 343556256599 and 343556256608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (343556256761) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 4447596 + ... + 4524181.

It is an arithmetic number, because the mean of its divisors is an integer number (43400976075).

Almost surely, 2^343556256661 is an apocalyptic number.

It is an amenable number.

343556256661 is a deficient number, since it is larger than the sum of its proper divisors (3651551939).

343556256661 is a wasteful number, since it uses less digits than its factorization.

343556256661 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8972183.

The product of its digits is 11664000, while the sum is 52.

The spelling of 343556256661 in words is "three hundred forty-three billion, five hundred fifty-six million, two hundred fifty-six thousand, six hundred sixty-one".