197518815312 has 160 divisors (see below), whose sum is σ = 628195959552. Its totient is φ = 52077330432.

The previous prime is 197518815281. The next prime is 197518815349. The reversal of 197518815312 is 213518815791.

197518815312 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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 31 ways as a sum of consecutive naturals, for example, 27064848 + ... + 27072144.

Almost surely, 2^197518815312 is an apocalyptic number.

197518815312 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197518815312, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (314097979776).

197518815312 is an abundant number, since it is smaller than the sum of its proper divisors (430677144240).

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

197518815312 is a wasteful number, since it uses less digits than its factorization.

197518815312 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13525 (or 13519 counting only the distinct ones).

The product of its digits is 604800, while the sum is 51.

The spelling of 197518815312 in words is "one hundred ninety-seven billion, five hundred eighteen million, eight hundred fifteen thousand, three hundred twelve".