344191075681 has 2 divisors, whose sum is σ = 344191075682. Its totient is φ = 344191075680.

The previous prime is 344191075663. The next prime is 344191075691. The reversal of 344191075681 is 186570191443.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 320039118400 + 24151957281 = 565720^2 + 155409^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-344191075681 is a prime.

It is a super-2 number, since 2×344191075681² (a number of 24 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (344191075691) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 172095537840 + 172095537841.

It is an arithmetic number, because the mean of its divisors is an integer number (172095537841).

Almost surely, 2^344191075681 is an apocalyptic number.

It is an amenable number.

344191075681 is a deficient number, since it is larger than the sum of its proper divisors (1).

344191075681 is an equidigital number, since it uses as much as digits as its factorization.

344191075681 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 725760, while the sum is 49.

The spelling of 344191075681 in words is "three hundred forty-four billion, one hundred ninety-one million, seventy-five thousand, six hundred eighty-one".