197849115897 has 16 divisors (see below), whose sum is σ = 277767202560. Its totient is φ = 124919431632.

The previous prime is 197849115887. The next prime is 197849115899. The reversal of 197849115897 is 798511948791.

It is not a de Polignac number, because 197849115897 - 2²³ = 197840727289 is a prime.

It is a super-2 number, since 2×197849115897² (a number of 23 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (197849115899) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 336303 + ... + 713300.

It is an arithmetic number, because the mean of its divisors is an integer number (17360450160).

Almost surely, 2^197849115897 is an apocalyptic number.

It is an amenable number.

197849115897 is a deficient number, since it is larger than the sum of its proper divisors (79918086663).

197849115897 is a wasteful number, since it uses less digits than its factorization.

197849115897 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1052932.

The product of its digits is 45722880, while the sum is 69.

The spelling of 197849115897 in words is "one hundred ninety-seven billion, eight hundred forty-nine million, one hundred fifteen thousand, eight hundred ninety-seven".