343339806659561 has 2 divisors, whose sum is σ = 343339806659562. Its totient is φ = 343339806659560.

The previous prime is 343339806659533. The next prime is 343339806659569. The reversal of 343339806659561 is 165956608933343.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 299065833990400 + 44273972669161 = 17293520^2 + 6653869^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-343339806659561 is a prime.

It is not a weakly prime, because it can be changed into another prime (343339806659569) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 171669903329780 + 171669903329781.

It is an arithmetic number, because the mean of its divisors is an integer number (171669903329781).

Almost surely, 2^{343339806659561} is an apocalyptic number.

It is an amenable number.

343339806659561 is a deficient number, since it is larger than the sum of its proper divisors (1).

343339806659561 is an equidigital number, since it uses as much as digits as its factorization.

343339806659561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1133740800, while the sum is 71.

The spelling of 343339806659561 in words is "three hundred forty-three trillion, three hundred thirty-nine billion, eight hundred six million, six hundred fifty-nine thousand, five hundred sixty-one".