1827013561 has 2 divisors, whose sum is σ = 1827013562. Its totient is φ = 1827013560.

The previous prime is 1827013537. The next prime is 1827013603. The reversal of 1827013561 is 1653107281.

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., 1372257936 + 454755625 = 37044^2 + 21325^2 .

It is a cyclic number.

It is not a de Polignac number, because 1827013561 - 2⁹ = 1827013049 is a prime.

It is not a weakly prime, because it can be changed into another prime (1827013061) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 913506780 + 913506781.

It is an arithmetic number, because the mean of its divisors is an integer number (913506781).

Almost surely, 2^1827013561 is an apocalyptic number.

It is an amenable number.

1827013561 is a deficient number, since it is larger than the sum of its proper divisors (1).

1827013561 is an equidigital number, since it uses as much as digits as its factorization.

1827013561 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 10080, while the sum is 34.

The square root of 1827013561 is about 42743.5791786322. The cubic root of 1827013561 is about 1222.4954656819.

The spelling of 1827013561 in words is "one billion, eight hundred twenty-seven million, thirteen thousand, five hundred sixty-one".