196447941491 has 2 divisors, whose sum is σ = 196447941492. Its totient is φ = 196447941490.

The previous prime is 196447941467. The next prime is 196447941499. The reversal of 196447941491 is 194149744691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196447941491 - 2⁶ = 196447941427 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 196447941491.

It is not a weakly prime, because it can be changed into another prime (196447941499) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98223970745 + 98223970746.

It is an arithmetic number, because the mean of its divisors is an integer number (98223970746).

Almost surely, 2^196447941491 is an apocalyptic number.

196447941491 is a deficient number, since it is larger than the sum of its proper divisors (1).

196447941491 is an equidigital number, since it uses as much as digits as its factorization.

196447941491 is an evil number, because the sum of its binary digits is even.

The product of its digits is 7838208, while the sum is 59.

The spelling of 196447941491 in words is "one hundred ninety-six billion, four hundred forty-seven million, nine hundred forty-one thousand, four hundred ninety-one".