197942072185 has 144 divisors (see below), whose sum is σ = 307810755072. Its totient is φ = 120982118400.

The previous prime is 197942072171. The next prime is 197942072201. The reversal of 197942072185 is 581270249791.

It is not a de Polignac number, because 197942072185 - 2¹³ = 197942063993 is a prime.

It is a Harshad number since it is a multiple of its sum of digits (55).

It is a Duffinian number.

It is an unprimeable number.

It is a polite number, since it can be written in 143 ways as a sum of consecutive naturals, for example, 83272717 + ... + 83275093.

It is an arithmetic number, because the mean of its divisors is an integer number (2137574688).

Almost surely, 2^197942072185 is an apocalyptic number.

It is an amenable number.

197942072185 is a deficient number, since it is larger than the sum of its proper divisors (109868682887).

197942072185 is a wasteful number, since it uses less digits than its factorization.

197942072185 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2484 (or 2454 counting only the distinct ones).

The product of its (nonzero) digits is 2540160, while the sum is 55.

The spelling of 197942072185 in words is "one hundred ninety-seven billion, nine hundred forty-two million, seventy-two thousand, one hundred eighty-five".