197191687680 has 1200 divisors, whose sum is σ = 812220474384. Its totient is φ = 45546209280.

The previous prime is 197191687661. The next prime is 197191687753. The reversal of 197191687680 is 86786191791.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 119 ways as a sum of consecutive naturals, for example, 595745115 + ... + 595745445.

Almost surely, 2^197191687680 is an apocalyptic number.

197191687680 is a gapful number since it is divisible by the number (10) 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 197191687680, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (406110237192).

197191687680 is an abundant number, since it is smaller than the sum of its proper divisors (615028786704).

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

197191687680 is a wasteful number, since it uses less digits than its factorization.

197191687680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 409 (or 371 counting only the distinct ones).

The product of its (nonzero) digits is 9144576, while the sum is 63.

The spelling of 197191687680 in words is "one hundred ninety-seven billion, one hundred ninety-one million, six hundred eighty-seven thousand, six hundred eighty".