27578661041 has 2 divisors, whose sum is σ = 27578661042. Its totient is φ = 27578661040.

The previous prime is 27578661031. The next prime is 27578661053. The reversal of 27578661041 is 14016687572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 26399425441 + 1179235600 = 162479^2 + 34340^2 .

It is a cyclic number.

It is not a de Polignac number, because 27578661041 - 2¹⁰ = 27578660017 is a prime.

It is not a weakly prime, because it can be changed into another prime (27578661031) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13789330520 + 13789330521.

It is an arithmetic number, because the mean of its divisors is an integer number (13789330521).

Almost surely, 2^27578661041 is an apocalyptic number.

It is an amenable number.

27578661041 is a deficient number, since it is larger than the sum of its proper divisors (1).

27578661041 is an equidigital number, since it uses as much as digits as its factorization.

27578661041 is an odious number, because the sum of its binary digits is odd.

The product of its (nonzero) digits is 564480, while the sum is 47.

The spelling of 27578661041 in words is "twenty-seven billion, five hundred seventy-eight million, six hundred sixty-one thousand, forty-one".