526651561 has 2 divisors, whose sum is σ = 526651562. Its totient is φ = 526651560.

The previous prime is 526651549. The next prime is 526651589. The reversal of 526651561 is 165156625.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 477160336 + 49491225 = 21844^2 + 7035^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-526651561 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 526651561.

It is not a weakly prime, because it can be changed into another prime (526651511) 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 as a sum of consecutive naturals, namely, 263325780 + 263325781.

It is an arithmetic number, because the mean of its divisors is an integer number (263325781).

Almost surely, 2^526651561 is an apocalyptic number.

It is an amenable number.

526651561 is a deficient number, since it is larger than the sum of its proper divisors (1).

526651561 is an equidigital number, since it uses as much as digits as its factorization.

526651561 is an odious number, because the sum of its binary digits is odd.

The product of its digits is 54000, while the sum is 37.

The square root of 526651561 is about 22948.8901910310. The cubic root of 526651561 is about 807.5593663440.

The spelling of 526651561 in words is "five hundred twenty-six million, six hundred fifty-one thousand, five hundred sixty-one".