27780550005529 has 2 divisors, whose sum is σ = 27780550005530. Its totient is φ = 27780550005528.

The previous prime is 27780550005521. The next prime is 27780550005583. The reversal of 27780550005529 is 92550005508772.

It is a weak prime.

It can be written as a sum of positive squares in only one way, i.e., 24011205415129 + 3769344590400 = 4900123^2 + 1941480^2 .

It is a cyclic number.

It is not a de Polignac number, because 27780550005529 - 2³ = 27780550005521 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27780550005529.

It is not a weakly prime, because it can be changed into another prime (27780550005521) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13890275002764 + 13890275002765.

It is an arithmetic number, because the mean of its divisors is an integer number (13890275002765).

Almost surely, 2^{27780550005529} is an apocalyptic number.

It is an amenable number.

27780550005529 is a deficient number, since it is larger than the sum of its proper divisors (1).

27780550005529 is an equidigital number, since it uses as much as digits as its factorization.

27780550005529 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 8820000, while the sum is 55.

The spelling of 27780550005529 in words is "twenty-seven trillion, seven hundred eighty billion, five hundred fifty million, five thousand, five hundred twenty-nine".