197984578680 has 192 divisors, whose sum is σ = 767344181760. Its totient is φ = 43286056704.

The previous prime is 197984578669. The next prime is 197984578681. The reversal of 197984578680 is 86875489791.

197984578680 is a `hidden beast` number, since 1 + 9 + 7 + 98 + 457 + 8 + 6 + 80 = 666.

197984578680 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a super-2 number, since 2×197984578680² (a number of 23 digits) contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (72).

It is a junction number, because it is equal to n+sod(n) for n = 197984578599 and 197984578608.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197984578681) by changing a digit.

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 47 ways as a sum of consecutive naturals, for example, 1649982 + ... + 1765901.

It is an arithmetic number, because the mean of its divisors is an integer number (3996584280).

Almost surely, 2^197984578680 is an apocalyptic number.

197984578680 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

197984578680 is an abundant number, since it is smaller than the sum of its proper divisors (569359603080).

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

197984578680 is a wasteful number, since it uses less digits than its factorization.

197984578680 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3415930 (or 3415923 counting only the distinct ones).

The product of its (nonzero) digits is 243855360, while the sum is 72.

The spelling of 197984578680 in words is "one hundred ninety-seven billion, nine hundred eighty-four million, five hundred seventy-eight thousand, six hundred eighty".