27552557261 has 2 divisors, whose sum is σ = 27552557262. Its totient is φ = 27552557260.

The previous prime is 27552557251. The next prime is 27552557311. The reversal of 27552557261 is 16275525572.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 18358624036 + 9193933225 = 135494^2 + 95885^2 .

It is a cyclic number.

It is not a de Polignac number, because 27552557261 - 2¹⁰ = 27552556237 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27552557251) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13776278630 + 13776278631.

It is an arithmetic number, because the mean of its divisors is an integer number (13776278631).

Almost surely, 2^27552557261 is an apocalyptic number.

It is an amenable number.

27552557261 is a deficient number, since it is larger than the sum of its proper divisors (1).

27552557261 is an equidigital number, since it uses as much as digits as its factorization.

27552557261 is an evil number, because the sum of its binary digits is even.

The product of its digits is 1470000, while the sum is 47.

The spelling of 27552557261 in words is "twenty-seven billion, five hundred fifty-two million, five hundred fifty-seven thousand, two hundred sixty-one".