196544978 has 24 divisors (see below), whose sum is σ = 343560204. Its totient is φ = 84084000.

The previous prime is 196544963. The next prime is 196545001. The reversal of 196544978 is 879445691.

It can be written as a sum of positive squares in 2 ways, for example, as 186131449 + 10413529 = 13643^2 + 3227^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 67268 + ... + 70128.

Almost surely, 2^196544978 is an apocalyptic number.

196544978 is a deficient number, since it is larger than the sum of its proper divisors (147015226).

196544978 is a wasteful number, since it uses less digits than its factorization.

196544978 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3578 (or 3571 counting only the distinct ones).

The product of its digits is 2177280, while the sum is 53.

The square root of 196544978 is about 14019.4499892114. The cubic root of 196544978 is about 581.4164527638.

The spelling of 196544978 in words is "one hundred ninety-six million, five hundred forty-four thousand, nine hundred seventy-eight".