198151989670 has 16 divisors (see below), whose sum is σ = 368972670960. Its totient is φ = 76527664864.

The previous prime is 198151989619. The next prime is 198151989689. The reversal of 198151989670 is 76989151891.

198151989670 is digitally balanced in base 2 and base 3, because in such bases it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×198151989670² (a number of 23 digits) contains 22 as substring.

It is a congruent number.

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 7 ways as a sum of consecutive naturals, for example, 341641072 + ... + 341641651.

It is an arithmetic number, because the mean of its divisors is an integer number (23060791935).

Almost surely, 2^198151989670 is an apocalyptic number.

198151989670 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

198151989670 is a deficient number, since it is larger than the sum of its proper divisors (170820681290).

198151989670 is a wasteful number, since it uses less digits than its factorization.

198151989670 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 683282759.

The product of its (nonzero) digits is 9797760, while the sum is 64.

The spelling of 198151989670 in words is "one hundred ninety-eight billion, one hundred fifty-one million, nine hundred eighty-nine thousand, six hundred seventy".