196638955947 has 24 divisors (see below), whose sum is σ = 324661515776. Its totient is φ = 112347403056.

The previous prime is 196638955921. The next prime is 196638955951. The reversal of 196638955947 is 749559836691.

196638955947 is a `hidden beast` number, since 1 + 9 + 6 + 63 + 8 + 9 + 559 + 4 + 7 = 666.

196638955947 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is not a de Polignac number, because 196638955947 - 2⁸ = 196638955691 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (196638955957) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 162078 + ... + 647724.

Almost surely, 2^196638955947 is an apocalyptic number.

196638955947 is a deficient number, since it is larger than the sum of its proper divisors (128022559829).

196638955947 is a wasteful number, since it uses less digits than its factorization.

196638955947 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 492087 (or 492084 counting only the distinct ones).

The product of its digits is 440899200, while the sum is 72.

The spelling of 196638955947 in words is "one hundred ninety-six billion, six hundred thirty-eight million, nine hundred fifty-five thousand, nine hundred forty-seven".