197857982977 has 16 divisors (see below), whose sum is σ = 220610839680. Its totient is φ = 176488595712.

The previous prime is 197857982929. The next prime is 197857983013. The reversal of 197857982977 is 779289758791.

It is a cyclic number.

It is not a de Polignac number, because 197857982977 - 2⁷ = 197857982849 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 197857982897 and 197857982906.

It is not an unprimeable number, because it can be changed into a prime (197857982177) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2278623 + ... + 2363860.

It is an arithmetic number, because the mean of its divisors is an integer number (13788177480).

Almost surely, 2^197857982977 is an apocalyptic number.

197857982977 is a gapful number since it is divisible by the number (17) formed by its first and last digit.

It is an amenable number.

197857982977 is a deficient number, since it is larger than the sum of its proper divisors (22752856703).

197857982977 is a wasteful number, since it uses less digits than its factorization.

197857982977 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 4642632.

The product of its digits is 1120210560, while the sum is 79.

The spelling of 197857982977 in words is "one hundred ninety-seven billion, eight hundred fifty-seven million, nine hundred eighty-two thousand, nine hundred seventy-seven".