196578144839 has 2 divisors, whose sum is σ = 196578144840. Its totient is φ = 196578144838.

The previous prime is 196578144799. The next prime is 196578144857. The reversal of 196578144839 is 938441875691.

It is a strong prime.

It is a cyclic number.

It is not a de Polignac number, because 196578144839 - 2²⁰ = 196577096263 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (196578114839) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98289072419 + 98289072420.

It is an arithmetic number, because the mean of its divisors is an integer number (98289072420).

Almost surely, 2^196578144839 is an apocalyptic number.

196578144839 is a deficient number, since it is larger than the sum of its proper divisors (1).

196578144839 is an equidigital number, since it uses as much as digits as its factorization.

196578144839 is an evil number, because the sum of its binary digits is even.

The product of its digits is 52254720, while the sum is 65.

The spelling of 196578144839 in words is "one hundred ninety-six billion, five hundred seventy-eight million, one hundred forty-four thousand, eight hundred thirty-nine".