196191987946543 has 2 divisors, whose sum is σ = 196191987946544. Its totient is φ = 196191987946542.

The previous prime is 196191987946519. The next prime is 196191987946613. The reversal of 196191987946543 is 345649789191691.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 196191987946543 - 2¹³ = 196191987938351 is a prime.

It is a super-2 number, since 2×196191987946543² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196191987943543) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98095993973271 + 98095993973272.

It is an arithmetic number, because the mean of its divisors is an integer number (98095993973272).

Almost surely, 2^{196191987946543} is an apocalyptic number.

196191987946543 is a deficient number, since it is larger than the sum of its proper divisors (1).

196191987946543 is an equidigital number, since it uses as much as digits as its factorization.

196191987946543 is an evil number, because the sum of its binary digits is even.

The product of its digits is 3174474240, while the sum is 82.

The spelling of 196191987946543 in words is "one hundred ninety-six trillion, one hundred ninety-one billion, nine hundred eighty-seven million, nine hundred forty-six thousand, five hundred forty-three".