196857821108 has 24 divisors (see below), whose sum is σ = 372479395680. Its totient is φ = 90495468000.

The previous prime is 196857821047. The next prime is 196857821119. The reversal of 196857821108 is 801128758691.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 7528238 + ... + 7554341.

It is an arithmetic number, because the mean of its divisors is an integer number (15519974820).

Almost surely, 2^196857821108 is an apocalyptic number.

It is an amenable number.

196857821108 is a deficient number, since it is larger than the sum of its proper divisors (175621574572).

196857821108 is a wasteful number, since it uses less digits than its factorization.

196857821108 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 15082847 (or 15082845 counting only the distinct ones).

The product of its (nonzero) digits is 1935360, while the sum is 56.

The spelling of 196857821108 in words is "one hundred ninety-six billion, eight hundred fifty-seven million, eight hundred twenty-one thousand, one hundred eight".