197511872449 has 2 divisors, whose sum is σ = 197511872450. Its totient is φ = 197511872448.

The previous prime is 197511872447. The next prime is 197511872461. The reversal of 197511872449 is 944278115791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 173778929424 + 23732943025 = 416868^2 + 154055^2 .

It is a cyclic number.

It is not a de Polignac number, because 197511872449 - 2¹ = 197511872447 is a prime.

Together with 197511872447, it forms a pair of twin primes.

It is a junction number, because it is equal to n+sod(n) for n = 197511872393 and 197511872402.

It is not a weakly prime, because it can be changed into another prime (197511872447) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98755936224 + 98755936225.

It is an arithmetic number, because the mean of its divisors is an integer number (98755936225).

Almost surely, 2^197511872449 is an apocalyptic number.

It is an amenable number.

197511872449 is a deficient number, since it is larger than the sum of its proper divisors (1).

197511872449 is an equidigital number, since it uses as much as digits as its factorization.

197511872449 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 5080320, while the sum is 58.

The spelling of 197511872449 in words is "one hundred ninety-seven billion, five hundred eleven million, eight hundred seventy-two thousand, four hundred forty-nine".