196581385836 has 192 divisors, whose sum is σ = 574538549760. Its totient is φ = 57602430720.

The previous prime is 196581385817. The next prime is 196581385841. The reversal of 196581385836 is 638583185691.

196581385836 is a `hidden beast` number, since 19 + 6 + 5 + 8 + 1 + 38 + 583 + 6 = 666.

It is an unprimeable number.

It is a polite number, since it can be written in 63 ways as a sum of consecutive naturals, for example, 7151110 + ... + 7178546.

It is an arithmetic number, because the mean of its divisors is an integer number (2992388280).

Almost surely, 2^196581385836 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196581385836, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (287269274880).

196581385836 is an abundant number, since it is smaller than the sum of its proper divisors (377957163924).

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

196581385836 is a wasteful number, since it uses less digits than its factorization.

196581385836 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 27661 (or 27653 counting only the distinct ones).

The product of its digits is 37324800, while the sum is 63.

The spelling of 196581385836 in words is "one hundred ninety-six billion, five hundred eighty-one million, three hundred eighty-five thousand, eight hundred thirty-six".