197503164909 has 6 divisors (see below), whose sum is σ = 285282349326. Its totient is φ = 131668776600.

The previous prime is 197503164863. The next prime is 197503164913. The reversal of 197503164909 is 909461305791.

197503164909 is a `hidden beast` number, since 1 + 97 + 50 + 3 + 16 + 490 + 9 = 666.

It can be written as a sum of positive squares in only one way, i.e., 146648404809 + 50854760100 = 382947^2 + 225510^2 .

It is not a de Polignac number, because 197503164909 - 2¹¹ = 197503162861 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (197503164959) by changing a digit.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 10972398042 + ... + 10972398059.

It is an arithmetic number, because the mean of its divisors is an integer number (47547058221).

Almost surely, 2^197503164909 is an apocalyptic number.

It is an amenable number.

197503164909 is a deficient number, since it is larger than the sum of its proper divisors (87779184417).

197503164909 is a wasteful number, since it uses less digits than its factorization.

197503164909 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 21944796107 (or 21944796104 counting only the distinct ones).

The product of its (nonzero) digits is 1837080, while the sum is 54.

The spelling of 197503164909 in words is "one hundred ninety-seven billion, five hundred three million, one hundred sixty-four thousand, nine hundred nine".