196837744891 has 2 divisors, whose sum is σ = 196837744892. Its totient is φ = 196837744890.

The previous prime is 196837744811. The next prime is 196837744907. The reversal of 196837744891 is 198447738691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196837744891 - 2¹³ = 196837736699 is a prime.

It is not a weakly prime, because it can be changed into another prime (196837744811) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98418872445 + 98418872446.

It is an arithmetic number, because the mean of its divisors is an integer number (98418872446).

Almost surely, 2^196837744891 is an apocalyptic number.

196837744891 is a deficient number, since it is larger than the sum of its proper divisors (1).

196837744891 is an equidigital number, since it uses as much as digits as its factorization.

196837744891 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 73156608, while the sum is 67.

The spelling of 196837744891 in words is "one hundred ninety-six billion, eight hundred thirty-seven million, seven hundred forty-four thousand, eight hundred ninety-one".