351375711717661 has 2 divisors, whose sum is σ = 351375711717662. Its totient is φ = 351375711717660.

The previous prime is 351375711717643. The next prime is 351375711717731. The reversal of 351375711717661 is 166717117573153.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 349907664460761 + 1468047256900 = 18705819^2 + 1211630^2 .

It is a cyclic number.

It is not a de Polignac number, because 351375711717661 - 2¹³ = 351375711709469 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 351375711717661.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (351375711717631) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 175687855858830 + 175687855858831.

It is an arithmetic number, because the mean of its divisors is an integer number (175687855858831).

Almost surely, 2^{351375711717661} is an apocalyptic number.

It is an amenable number.

351375711717661 is a deficient number, since it is larger than the sum of its proper divisors (1).

351375711717661 is an equidigital number, since it uses as much as digits as its factorization.

351375711717661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 19448100, while the sum is 61.

The spelling of 351375711717661 in words is "three hundred fifty-one trillion, three hundred seventy-five billion, seven hundred eleven million, seven hundred seventeen thousand, six hundred sixty-one".