196705678580 has 18 divisors (see below), whose sum is σ = 413086090326. Its totient is φ = 78681478048.

The previous prime is 196705678579. The next prime is 196705678649. The reversal of 196705678580 is 85876507691.

It can be written as a sum of positive squares in 3 ways, for example, as 3068716816 + 193636961764 = 55396^2 + 440042^2 .

It is a congruent 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, 1933874 + ... + 2033046.

Almost surely, 2^196705678580 is an apocalyptic number.

196705678580 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

196705678580 is an abundant number, since it is smaller than the sum of its proper divisors (216380411746).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

196705678580 is an frugal number, since it uses more digits than its factorization.

196705678580 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 198355 (or 99180 counting only the distinct ones).

The product of its (nonzero) digits is 25401600, while the sum is 62.

The spelling of 196705678580 in words is "one hundred ninety-six billion, seven hundred five million, six hundred seventy-eight thousand, five hundred eighty".