198363825806 has 8 divisors (see below), whose sum is σ = 297554800800. Its totient is φ = 99178892208.

The previous prime is 198363825799. The next prime is 198363825809. The reversal of 198363825806 is 608528363891.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a super-2 number, since 2×198363825806² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198363825809) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1427351 + ... + 1560146.

It is an arithmetic number, because the mean of its divisors is an integer number (37194350100).

Almost surely, 2^198363825806 is an apocalyptic number.

198363825806 is a deficient number, since it is larger than the sum of its proper divisors (99190974994).

198363825806 is a wasteful number, since it uses less digits than its factorization.

198363825806 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3020698.

The product of its (nonzero) digits is 14929920, while the sum is 59.

The spelling of 198363825806 in words is "one hundred ninety-eight billion, three hundred sixty-three million, eight hundred twenty-five thousand, eight hundred six".