197932254721 has 16 divisors (see below), whose sum is σ = 201729945600. Its totient is φ = 194153181120.

The previous prime is 197932254703. The next prime is 197932254781. The reversal of 197932254721 is 127452239791.

It is a cyclic number.

It is not a de Polignac number, because 197932254721 - 2¹¹ = 197932252673 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (197932254781) 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, 41242080 + ... + 41246878.

It is an arithmetic number, because the mean of its divisors is an integer number (12608121600).

Almost surely, 2^197932254721 is an apocalyptic number.

It is an amenable number.

197932254721 is a deficient number, since it is larger than the sum of its proper divisors (3797690879).

197932254721 is a wasteful number, since it uses less digits than its factorization.

197932254721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6576.

The product of its digits is 1905120, while the sum is 52.

The spelling of 197932254721 in words is "one hundred ninety-seven billion, nine hundred thirty-two million, two hundred fifty-four thousand, seven hundred twenty-one".