345450231661 has 2 divisors, whose sum is σ = 345450231662. Its totient is φ = 345450231660.

The previous prime is 345450231557. The next prime is 345450231683. The reversal of 345450231661 is 166132054543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 344928337636 + 521894025 = 587306^2 + 22845^2 .

It is a cyclic number.

It is not a de Polignac number, because 345450231661 - 2⁹ = 345450231149 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345450231361) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172725115830 + 172725115831.

It is an arithmetic number, because the mean of its divisors is an integer number (172725115831).

Almost surely, 2^345450231661 is an apocalyptic number.

It is an amenable number.

345450231661 is a deficient number, since it is larger than the sum of its proper divisors (1).

345450231661 is an equidigital number, since it uses as much as digits as its factorization.

345450231661 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 259200, while the sum is 40.

The spelling of 345450231661 in words is "three hundred forty-five billion, four hundred fifty million, two hundred thirty-one thousand, six hundred sixty-one".