196247781025 has 6 divisors (see below), whose sum is σ = 243347248502. Its totient is φ = 156998224800.

The previous prime is 196247781019. The next prime is 196247781047. The reversal of 196247781025 is 520187742691.

It can be written as a sum of positive squares in 3 ways, for example, as 84713616 + 196163067409 = 9204^2 + 442903^2 .

It is a de Polignac number, because none of the positive numbers 2^k-196247781025 is a prime.

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3924955596 + ... + 3924955645.

Almost surely, 2^196247781025 is an apocalyptic number.

It is an amenable number.

196247781025 is a deficient number, since it is larger than the sum of its proper divisors (47099467477).

196247781025 is an equidigital number, since it uses as much as digits as its factorization.

196247781025 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 7849911251 (or 7849911246 counting only the distinct ones).

The product of its (nonzero) digits is 1693440, while the sum is 52.

The spelling of 196247781025 in words is "one hundred ninety-six billion, two hundred forty-seven million, seven hundred eighty-one thousand, twenty-five".