345543440245261 has 2 divisors, whose sum is σ = 345543440245262. Its totient is φ = 345543440245260.

The previous prime is 345543440245189. The next prime is 345543440245307. The reversal of 345543440245261 is 162542044345543.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 327480778744900 + 18062661500361 = 18096430^2 + 4250019^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-345543440245261 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 345543440245199 and 345543440245208.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (345543440240261) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172771720122630 + 172771720122631.

It is an arithmetic number, because the mean of its divisors is an integer number (172771720122631).

Almost surely, 2^{345543440245261} is an apocalyptic number.

It is an amenable number.

345543440245261 is a deficient number, since it is larger than the sum of its proper divisors (1).

345543440245261 is an equidigital number, since it uses as much as digits as its factorization.

345543440245261 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 27648000, while the sum is 52.

The spelling of 345543440245261 in words is "three hundred forty-five trillion, five hundred forty-three billion, four hundred forty million, two hundred forty-five thousand, two hundred sixty-one".