197756733545089 has 2 divisors, whose sum is σ = 197756733545090. Its totient is φ = 197756733545088.

The previous prime is 197756733545027. The next prime is 197756733545123. The reversal of 197756733545089 is 980545337657791.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 190910179850625 + 6846553694464 = 13817025^2 + 2616592^2 .

It is an emirp because it is prime and its reverse (980545337657791) is a distict prime.

It is a cyclic number.

It is not a de Polignac number, because 197756733545089 - 2⁹ = 197756733544577 is a prime.

It is not a weakly prime, because it can be changed into another prime (197756733545489) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98878366772544 + 98878366772545.

It is an arithmetic number, because the mean of its divisors is an integer number (98878366772545).

Almost surely, 2^{197756733545089} is an apocalyptic number.

It is an amenable number.

197756733545089 is a deficient number, since it is larger than the sum of its proper divisors (1).

197756733545089 is an equidigital number, since it uses as much as digits as its factorization.

197756733545089 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 6001128000, while the sum is 79.

The spelling of 197756733545089 in words is "one hundred ninety-seven trillion, seven hundred fifty-six billion, seven hundred thirty-three million, five hundred forty-five thousand, eighty-nine".