61191441 has 6 divisors (see below), whose sum is σ = 88387650. Its totient is φ = 40794288.

The previous prime is 61191439. The next prime is 61191497. The reversal of 61191441 is 14419116.

61191441 is a `hidden beast` number, since 611 + 9 + 1 + 4 + 41 = 666.

61191441 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It can be written as a sum of positive squares in only one way, i.e., 41796225 + 19395216 = 6465^2 + 4404^2 .

It is not a de Polignac number, because 61191441 - 2¹ = 61191439 is a prime.

It is not an unprimeable number, because it can be changed into a prime (61191841) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 3399516 + ... + 3399533.

It is an arithmetic number, because the mean of its divisors is an integer number (14731275).

Almost surely, 2^61191441 is an apocalyptic number.

It is an amenable number.

61191441 is a deficient number, since it is larger than the sum of its proper divisors (27196209).

61191441 is a wasteful number, since it uses less digits than its factorization.

61191441 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6799055 (or 6799052 counting only the distinct ones).

The product of its digits is 864, while the sum is 27.

The square root of 61191441 is about 7822.4958293373. The cubic root of 61191441 is about 394.0610953383.

The spelling of 61191441 in words is "sixty-one million, one hundred ninety-one thousand, four hundred forty-one".