198765856806 has 16 divisors (see below), whose sum is σ = 433670960448. Its totient is φ = 60232077800.

The previous prime is 198765856787. The next prime is 198765856837. The reversal of 198765856806 is 608658567891.

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, 1505801880 + ... + 1505802011.

It is an arithmetic number, because the mean of its divisors is an integer number (27104435028).

Almost surely, 2^198765856806 is an apocalyptic number.

198765856806 is an abundant number, since it is smaller than the sum of its proper divisors (234905103642).

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

198765856806 is a wasteful number, since it uses less digits than its factorization.

198765856806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3011603907.

The product of its (nonzero) digits is 174182400, while the sum is 69.

The spelling of 198765856806 in words is "one hundred ninety-eight billion, seven hundred sixty-five million, eight hundred fifty-six thousand, eight hundred six".