197257640533 has 2 divisors, whose sum is σ = 197257640534. Its totient is φ = 197257640532.

The previous prime is 197257640513. The next prime is 197257640599. The reversal of 197257640533 is 335046752791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 180810347524 + 16447293009 = 425218^2 + 128247^2 .

It is a cyclic number.

It is not a de Polignac number, because 197257640533 - 2¹⁷ = 197257509461 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197257640513) 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, 98628820266 + 98628820267.

It is an arithmetic number, because the mean of its divisors is an integer number (98628820267).

Almost surely, 2^197257640533 is an apocalyptic number.

It is an amenable number.

197257640533 is a deficient number, since it is larger than the sum of its proper divisors (1).

197257640533 is an equidigital number, since it uses as much as digits as its factorization.

197257640533 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 4762800, while the sum is 52.

The spelling of 197257640533 in words is "one hundred ninety-seven billion, two hundred fifty-seven million, six hundred forty thousand, five hundred thirty-three".