1696861726489 has 2 divisors, whose sum is σ = 1696861726490. Its totient is φ = 1696861726488.

The previous prime is 1696861726477. The next prime is 1696861726493. The reversal of 1696861726489 is 9846271686961.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 1687349040400 + 9512686089 = 1298980^2 + 97533^2 .

It is a cyclic number.

It is not a de Polignac number, because 1696861726489 - 2³¹ = 1694714242841 is a prime.

It is not a weakly prime, because it can be changed into another prime (1696861726409) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 848430863244 + 848430863245.

It is an arithmetic number, because the mean of its divisors is an integer number (848430863245).

Almost surely, 2^{1696861726489} is an apocalyptic number.

It is an amenable number.

1696861726489 is a deficient number, since it is larger than the sum of its proper divisors (1).

1696861726489 is an equidigital number, since it uses as much as digits as its factorization.

1696861726489 is an evil number, because the sum of its binary digits is even.

The product of its digits is 376233984, while the sum is 73.

The spelling of 1696861726489 in words is "one trillion, six hundred ninety-six billion, eight hundred sixty-one million, seven hundred twenty-six thousand, four hundred eighty-nine".