197764077484811 has 2 divisors, whose sum is σ = 197764077484812. Its totient is φ = 197764077484810.

The previous prime is 197764077484741. The next prime is 197764077484859. The reversal of 197764077484811 is 118484770467791.

It is a strong prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-197764077484811 is a prime.

It is a super-2 number, since 2×197764077484811² (a number of 29 digits) contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (197764077484871) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98882038742405 + 98882038742406.

It is an arithmetic number, because the mean of its divisors is an integer number (98882038742406).

Almost surely, 2^{197764077484811} is an apocalyptic number.

197764077484811 is a deficient number, since it is larger than the sum of its proper divisors (1).

197764077484811 is an equidigital number, since it uses as much as digits as its factorization.

197764077484811 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 531062784, while the sum is 74.

The spelling of 197764077484811 in words is "one hundred ninety-seven trillion, seven hundred sixty-four billion, seventy-seven million, four hundred eighty-four thousand, eight hundred eleven".