196939438825 has 6 divisors (see below), whose sum is σ = 244204904174. Its totient is φ = 157551551040.

The previous prime is 196939438811. The next prime is 196939438849. The reversal of 196939438825 is 528834939691.

It can be written as a sum of positive squares in 3 ways, for example, as 30908452864 + 166030985961 = 175808^2 + 407469^2 .

It is not a de Polignac number, because 196939438825 - 2⁷ = 196939438697 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, 3938788752 + ... + 3938788801.

Almost surely, 2^196939438825 is an apocalyptic number.

It is an amenable number.

196939438825 is a deficient number, since it is larger than the sum of its proper divisors (47265465349).

196939438825 is an equidigital number, since it uses as much as digits as its factorization.

196939438825 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 7877577563 (or 7877577558 counting only the distinct ones).

The product of its digits is 100776960, while the sum is 67.

The spelling of 196939438825 in words is "one hundred ninety-six billion, nine hundred thirty-nine million, four hundred thirty-eight thousand, eight hundred twenty-five".