196819367978 has 8 divisors (see below), whose sum is σ = 295875068772. Its totient is φ = 98194345056.

The previous prime is 196819367959. The next prime is 196819367989. The reversal of 196819367978 is 879763918691.

196819367978 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in 2 ways, for example, as 193175193289 + 3644174689 = 439517^2 + 60367^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×196819367978² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

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 3 ways as a sum of consecutive naturals, for example, 107668325 + ... + 107670152.

Almost surely, 2^196819367978 is an apocalyptic number.

196819367978 is a deficient number, since it is larger than the sum of its proper divisors (99055700794).

196819367978 is a wasteful number, since it uses less digits than its factorization.

196819367978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 215338936.

The product of its digits is 246903552, while the sum is 74.

The spelling of 196819367978 in words is "one hundred ninety-six billion, eight hundred nineteen million, three hundred sixty-seven thousand, nine hundred seventy-eight".