351444431325661 has 2 divisors, whose sum is σ = 351444431325662. Its totient is φ = 351444431325660.

The previous prime is 351444431325601. The next prime is 351444431325671. The reversal of 351444431325661 is 166523134444153.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 324421120749636 + 27023310576025 = 18011694^2 + 5198395^2 .

It is a cyclic number.

It is not a de Polignac number, because 351444431325661 - 2³³ = 351435841391069 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 351444431325599 and 351444431325608.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351444431325601) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175722215662830 + 175722215662831.

It is an arithmetic number, because the mean of its divisors is an integer number (175722215662831).

Almost surely, 2^{351444431325661} is an apocalyptic number.

It is an amenable number.

351444431325661 is a deficient number, since it is larger than the sum of its proper divisors (1).

351444431325661 is an equidigital number, since it uses as much as digits as its factorization.

351444431325661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 12441600, while the sum is 52.

The spelling of 351444431325661 in words is "three hundred fifty-one trillion, four hundred forty-four billion, four hundred thirty-one million, three hundred twenty-five thousand, six hundred sixty-one".