197005485581 has 2 divisors, whose sum is σ = 197005485582. Its totient is φ = 197005485580.

The previous prime is 197005485577. The next prime is 197005485629. The reversal of 197005485581 is 185584500791.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 188803285225 + 8202200356 = 434515^2 + 90566^2 .

It is a cyclic number.

It is not a de Polignac number, because 197005485581 - 2² = 197005485577 is a prime.

It is a super-3 number, since 3×197005485581³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (197004485581) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 98502742790 + 98502742791.

It is an arithmetic number, because the mean of its divisors is an integer number (98502742791).

Almost surely, 2^197005485581 is an apocalyptic number.

It is an amenable number.

197005485581 is a deficient number, since it is larger than the sum of its proper divisors (1).

197005485581 is an equidigital number, since it uses as much as digits as its factorization.

197005485581 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2016000, while the sum is 53.

The spelling of 197005485581 in words is "one hundred ninety-seven billion, five million, four hundred eighty-five thousand, five hundred eighty-one".