97812278019569 has 2 divisors, whose sum is σ = 97812278019570. Its totient is φ = 97812278019568.

The previous prime is 97812278019557. The next prime is 97812278019601. The reversal of 97812278019569 is 96591087221879.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 97224786429169 + 587491590400 = 9860263^2 + 766480^2 .

It is a cyclic number.

It is not a de Polignac number, because 97812278019569 - 2⁴ = 97812278019553 is a prime.

It is a super-2 number, since 2×97812278019569² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 97812278019496 and 97812278019505.

It is not a weakly prime, because it can be changed into another prime (97812278019539) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 48906139009784 + 48906139009785.

It is an arithmetic number, because the mean of its divisors is an integer number (48906139009785).

Almost surely, 2^{97812278019569} is an apocalyptic number.

It is an amenable number.

97812278019569 is a deficient number, since it is larger than the sum of its proper divisors (1).

97812278019569 is an equidigital number, since it uses as much as digits as its factorization.

97812278019569 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 274337280, while the sum is 74.

The spelling of 97812278019569 in words is "ninety-seven trillion, eight hundred twelve billion, two hundred seventy-eight million, nineteen thousand, five hundred sixty-nine".