797982289661 has 2 divisors, whose sum is σ = 797982289662. Its totient is φ = 797982289660.

The previous prime is 797982289607. The next prime is 797982289669. The reversal of 797982289661 is 166982289797.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 617245922500 + 180736367161 = 785650^2 + 425131^2 .

It is a cyclic number.

It is not a de Polignac number, because 797982289661 - 2²² = 797978095357 is a prime.

It is a super-2 number, since 2×797982289661² (a number of 25 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (797982289669) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 398991144830 + 398991144831.

It is an arithmetic number, because the mean of its divisors is an integer number (398991144831).

Almost surely, 2^797982289661 is an apocalyptic number.

It is an amenable number.

797982289661 is a deficient number, since it is larger than the sum of its proper divisors (1).

797982289661 is an equidigital number, since it uses as much as digits as its factorization.

797982289661 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 329204736, while the sum is 74.

The spelling of 797982289661 in words is "seven hundred ninety-seven billion, nine hundred eighty-two million, two hundred eighty-nine thousand, six hundred sixty-one".