206798493578 has 4 divisors (see below), whose sum is σ = 310197740370. Its totient is φ = 103399246788.

The previous prime is 206798493563. The next prime is 206798493589. The reversal of 206798493578 is 875394897602.

It is a happy number.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 206794834009 + 3659569 = 454747^2 + 1913^2 .

It is a super-2 number, since 2×206798493578² (a number of 23 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 51699623393 + ... + 51699623396.

Almost surely, 2^206798493578 is an apocalyptic number.

206798493578 is a deficient number, since it is larger than the sum of its proper divisors (103399246792).

206798493578 is a wasteful number, since it uses less digits than its factorization.

206798493578 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 103399246791.

The product of its (nonzero) digits is 182891520, while the sum is 68.

The spelling of 206798493578 in words is "two hundred six billion, seven hundred ninety-eight million, four hundred ninety-three thousand, five hundred seventy-eight".