197994741156 has 27 divisors (see below), whose sum is σ = 500493455553. Its totient is φ = 65997357120.

The previous prime is 197994741151. The next prime is 197994741167. The reversal of 197994741156 is 651147499791.

The square root of 197994741156 is 444966.

It is a perfect power (a square), and thus also a powerful number.

197994741156 is a `hidden beast` number, since 1 + 9 + 7 + 9 + 9 + 474 + 1 + 156 = 666.

It can be written as a sum of positive squares in only one way, i.e., 134127342756 + 63867398400 = 366234^2 + 252720^2 .

It is a junction number, because it is equal to n+sod(n) for n = 197994741093 and 197994741102.

It is not an unprimeable number, because it can be changed into a prime (197994741151) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2632716 + ... + 2706876.

Almost surely, 2^197994741156 is an apocalyptic number.

197994741156 is the 444966-th square number.

It is an amenable number.

197994741156 is an abundant number, since it is smaller than the sum of its proper divisors (302498714397).

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

197994741156 is an frugal number, since it uses more digits than its factorization.

197994741156 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 148332 (or 74166 counting only the distinct ones).

The product of its digits is 17146080, while the sum is 63.

The spelling of 197994741156 in words is "one hundred ninety-seven billion, nine hundred ninety-four million, seven hundred forty-one thousand, one hundred fifty-six".