27201971061 has 24 divisors (see below), whose sum is σ = 40182100920. Its totient is φ = 17726257536.

The previous prime is 27201971057. The next prime is 27201971089. The reversal of 27201971061 is 16017910272.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 98604900 + 27103366161 = 9930^2 + 164631^2 .

It is not a de Polignac number, because 27201971061 - 2² = 27201971057 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27201971051) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 22315 + ... + 234311.

It is an arithmetic number, because the mean of its divisors is an integer number (1674254205).

Almost surely, 2^27201971061 is an apocalyptic number.

It is an amenable number.

27201971061 is a deficient number, since it is larger than the sum of its proper divisors (12980129859).

27201971061 is a wasteful number, since it uses less digits than its factorization.

27201971061 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 212325 (or 212322 counting only the distinct ones).

The product of its (nonzero) digits is 10584, while the sum is 36.

The spelling of 27201971061 in words is "twenty-seven billion, two hundred one million, nine hundred seventy-one thousand, sixty-one".