4261726561 has 2 divisors, whose sum is σ = 4261726562. Its totient is φ = 4261726560.

The previous prime is 4261726531. The next prime is 4261726663. The reversal of 4261726561 is 1656271624.

It is a happy number.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 3279280225 + 982446336 = 57265^2 + 31344^2 .

It is a cyclic number.

It is not a de Polignac number, because 4261726561 - 2⁵ = 4261726529 is a prime.

It is not a weakly prime, because it can be changed into another prime (4261726531) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 2130863280 + 2130863281.

It is an arithmetic number, because the mean of its divisors is an integer number (2130863281).

Almost surely, 2^4261726561 is an apocalyptic number.

It is an amenable number.

4261726561 is a deficient number, since it is larger than the sum of its proper divisors (1).

4261726561 is an equidigital number, since it uses as much as digits as its factorization.

4261726561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 120960, while the sum is 40.

The square root of 4261726561 is about 65281.9007152825. The cubic root of 4261726561 is about 1621.2943170610.

The spelling of 4261726561 in words is "four billion, two hundred sixty-one million, seven hundred twenty-six thousand, five hundred sixty-one".