197742228156 has 120 divisors (see below), whose sum is σ = 564228846720. Its totient is φ = 59890298400.

The previous prime is 197742228139. The next prime is 197742228169. The reversal of 197742228156 is 651822247791.

197742228156 is a `hidden beast` number, since 1 + 97 + 7 + 422 + 2 + 81 + 56 = 666.

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

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 7253391 + ... + 7280601.

It is an arithmetic number, because the mean of its divisors is an integer number (4701907056).

Almost surely, 2^197742228156 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 197742228156, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (282114423360).

197742228156 is an abundant number, since it is smaller than the sum of its proper divisors (366486618564).

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

197742228156 is a wasteful number, since it uses less digits than its factorization.

197742228156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29277 (or 29266 counting only the distinct ones).

The product of its digits is 3386880, while the sum is 54.

The spelling of 197742228156 in words is "one hundred ninety-seven billion, seven hundred forty-two million, two hundred twenty-eight thousand, one hundred fifty-six".