97778061659 has 2 divisors, whose sum is σ = 97778061660. Its totient is φ = 97778061658.

The previous prime is 97778061643. The next prime is 97778061701. The reversal of 97778061659 is 95616087779.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 97778061659 - 2⁴ = 97778061643 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 97778061595 and 97778061604.

It is not a weakly prime, because it can be changed into another prime (97778061629) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48889030829 + 48889030830.

It is an arithmetic number, because the mean of its divisors is an integer number (48889030830).

Almost surely, 2^97778061659 is an apocalyptic number.

97778061659 is a deficient number, since it is larger than the sum of its proper divisors (1).

97778061659 is an equidigital number, since it uses as much as digits as its factorization.

97778061659 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 40007520, while the sum is 65.

The spelling of 97778061659 in words is "ninety-seven billion, seven hundred seventy-eight million, sixty-one thousand, six hundred fifty-nine".