67031848561 has 2 divisors, whose sum is σ = 67031848562. Its totient is φ = 67031848560.

The previous prime is 67031848523. The next prime is 67031848567. The reversal of 67031848561 is 16584813076.

It is a happy number.

It is a strong prime.

It can be written as a sum of positive squares in only one way, i.e., 54268497936 + 12763350625 = 232956^2 + 112975^2 .

It is a cyclic number.

It is not a de Polignac number, because 67031848561 - 2²³ = 67023459953 is a prime.

It is not a weakly prime, because it can be changed into another prime (67031848567) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 33515924280 + 33515924281.

It is an arithmetic number, because the mean of its divisors is an integer number (33515924281).

Almost surely, 2^67031848561 is an apocalyptic number.

It is an amenable number.

67031848561 is a deficient number, since it is larger than the sum of its proper divisors (1).

67031848561 is an equidigital number, since it uses as much as digits as its factorization.

67031848561 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 967680, while the sum is 49.

The spelling of 67031848561 in words is "sixty-seven billion, thirty-one million, eight hundred forty-eight thousand, five hundred sixty-one".