5661526081 has 2 divisors, whose sum is σ = 5661526082. Its totient is φ = 5661526080.

The previous prime is 5661526051. The next prime is 5661526111. The reversal of 5661526081 is 1806251665.

It is a balanced prime because it is at equal distance from previous prime (5661526051) and next prime (5661526111).

It can be written as a sum of positive squares in only one way, i.e., 5549505025 + 112021056 = 74495^2 + 10584^2 .

It is a cyclic number.

It is not a de Polignac number, because 5661526081 - 2⁵ = 5661526049 is a prime.

It is a super-2 number, since 2×5661526081² = 64105755131686437122, which contains 22 as substring.

It is not a weakly prime, because it can be changed into another prime (5661526021) 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, 2830763040 + 2830763041.

It is an arithmetic number, because the mean of its divisors is an integer number (2830763041).

Almost surely, 2^5661526081 is an apocalyptic number.

It is an amenable number.

5661526081 is a deficient number, since it is larger than the sum of its proper divisors (1).

5661526081 is an equidigital number, since it uses as much as digits as its factorization.

5661526081 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 86400, while the sum is 40.

The square root of 5661526081 is about 75243.1131798785. The cubic root of 5661526081 is about 1782.2878128810.

The spelling of 5661526081 in words is "five billion, six hundred sixty-one million, five hundred twenty-six thousand, eighty-one".