198138502140 has 48 divisors (see below), whose sum is σ = 554841796992. Its totient is φ = 52831791936.

The previous prime is 198138502139. The next prime is 198138502141. The reversal of 198138502140 is 41205831891.

It is an interprime number because it is at equal distance from previous prime (198138502139) and next prime (198138502141).

It is a super-3 number, since 3×198138502140³ (a number of 35 digits) contains 333 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 198138502092 and 198138502101.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (198138502141) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 482247 + ... + 792993.

It is an arithmetic number, because the mean of its divisors is an integer number (11559204104).

Almost surely, 2^198138502140 is an apocalyptic number.

198138502140 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

198138502140 is an abundant number, since it is smaller than the sum of its proper divisors (356703294852).

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

198138502140 is a wasteful number, since it uses less digits than its factorization.

198138502140 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 321386 (or 321384 counting only the distinct ones).

The product of its (nonzero) digits is 69120, while the sum is 42.

The spelling of 198138502140 in words is "one hundred ninety-eight billion, one hundred thirty-eight million, five hundred two thousand, one hundred forty".