198816187670 has 16 divisors (see below), whose sum is σ = 360270946800. Its totient is φ = 78992739744.

The previous prime is 198816187631. The next prime is 198816187673. The reversal of 198816187670 is 76781618891.

It is a happy number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198816187673) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 66715352 + ... + 66718331.

It is an arithmetic number, because the mean of its divisors is an integer number (22516934175).

Almost surely, 2^198816187670 is an apocalyptic number.

198816187670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198816187670 is a deficient number, since it is larger than the sum of its proper divisors (161454759130).

198816187670 is a wasteful number, since it uses less digits than its factorization.

198816187670 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 133433839.

The product of its (nonzero) digits is 8128512, while the sum is 62.

The spelling of 198816187670 in words is "one hundred ninety-eight billion, eight hundred sixteen million, one hundred eighty-seven thousand, six hundred seventy".