196808115906 has 96 divisors (see below), whose sum is σ = 445856925696. Its totient is φ = 65063250000.

The previous prime is 196808115871. The next prime is 196808115913. The reversal of 196808115906 is 609511808691.

196808115906 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 55111101 + ... + 55114671.

It is an arithmetic number, because the mean of its divisors is an integer number (4644342976).

Almost surely, 2^196808115906 is an apocalyptic number.

It is a practical number, because each smaller number is the sum of distinct divisors of 196808115906, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (222928462848).

196808115906 is an abundant number, since it is smaller than the sum of its proper divisors (249048809790).

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

196808115906 is a wasteful number, since it uses less digits than its factorization.

196808115906 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4490 (or 4478 counting only the distinct ones).

The product of its (nonzero) digits is 933120, while the sum is 54.

The spelling of 196808115906 in words is "one hundred ninety-six billion, eight hundred eight million, one hundred fifteen thousand, nine hundred six".