1506834331661 has 2 divisors, whose sum is σ = 1506834331662. Its totient is φ = 1506834331660.

The previous prime is 1506834331633. The next prime is 1506834331687. The reversal of 1506834331661 is 1661334386051.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1011042316036 + 495792015625 = 1005506^2 + 704125^2 .

It is a cyclic number.

It is not a de Polignac number, because 1506834331661 - 2¹⁰ = 1506834330637 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (1506834331061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 753417165830 + 753417165831.

It is an arithmetic number, because the mean of its divisors is an integer number (753417165831).

Almost surely, 2^{1506834331661} is an apocalyptic number.

It is an amenable number.

1506834331661 is a deficient number, since it is larger than the sum of its proper divisors (1).

1506834331661 is an equidigital number, since it uses as much as digits as its factorization.

1506834331661 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 933120, while the sum is 47.

The spelling of 1506834331661 in words is "one trillion, five hundred six billion, eight hundred thirty-four million, three hundred thirty-one thousand, six hundred sixty-one".