75581161 has 2 divisors, whose sum is σ = 75581162. Its totient is φ = 75581160.

The previous prime is 75581153. The next prime is 75581171. The reversal of 75581161 is 16118557.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 47955625 + 27625536 = 6925^2 + 5256^2 .

It is a cyclic number.

It is not a de Polignac number, because 75581161 - 2³ = 75581153 is a prime.

It is not a weakly prime, because it can be changed into another prime (75581171) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 37790580 + 37790581.

It is an arithmetic number, because the mean of its divisors is an integer number (37790581).

Almost surely, 2^75581161 is an apocalyptic number.

It is an amenable number.

75581161 is a deficient number, since it is larger than the sum of its proper divisors (1).

75581161 is an equidigital number, since it uses as much as digits as its factorization.

75581161 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 8400, while the sum is 34.

The square root of 75581161 is about 8693.7426347920. The cubic root of 75581161 is about 422.8027982386.

The spelling of 75581161 in words is "seventy-five million, five hundred eighty-one thousand, one hundred sixty-one".