197797111272 has 128 divisors (see below), whose sum is σ = 562004697600. Its totient is φ = 64428574464.

The previous prime is 197797111261. The next prime is 197797111277. The reversal of 197797111272 is 272111797791.

197797111272 is a `hidden beast` number, since 197 + 79 + 7 + 111 + 272 = 666.

It is a Harshad number since it is a multiple of its sum of digits (54).

It is not an unprimeable number, because it can be changed into a prime (197797111277) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 6614338 + ... + 6644174.

It is an arithmetic number, because the mean of its divisors is an integer number (4390661700).

Almost surely, 2^197797111272 is an apocalyptic number.

197797111272 is a gapful number since it is divisible by the number (12) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197797111272, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (281002348800).

197797111272 is an abundant number, since it is smaller than the sum of its proper divisors (364207586328).

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

197797111272 is a wasteful number, since it uses less digits than its factorization.

197797111272 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 30552 (or 30542 counting only the distinct ones).

The product of its digits is 777924, while the sum is 54.

The spelling of 197797111272 in words is "one hundred ninety-seven billion, seven hundred ninety-seven million, one hundred eleven thousand, two hundred seventy-two".