344303561621 has 2 divisors, whose sum is σ = 344303561622. Its totient is φ = 344303561620.

The previous prime is 344303561561. The next prime is 344303561629. The reversal of 344303561621 is 126165303443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 226095495025 + 118208066596 = 475495^2 + 343814^2 .

It is a cyclic number.

It is not a de Polignac number, because 344303561621 - 2⁶ = 344303561557 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (344303561629) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172151780810 + 172151780811.

It is an arithmetic number, because the mean of its divisors is an integer number (172151780811).

Almost surely, 2^344303561621 is an apocalyptic number.

It is an amenable number.

344303561621 is a deficient number, since it is larger than the sum of its proper divisors (1).

344303561621 is an equidigital number, since it uses as much as digits as its factorization.

344303561621 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 155520, while the sum is 38.

The spelling of 344303561621 in words is "three hundred forty-four billion, three hundred three million, five hundred sixty-one thousand, six hundred twenty-one".