27780275005555 has 16 divisors (see below), whose sum is σ = 34642646496000. Its totient is φ = 21362965303680.

The previous prime is 27780275005547. The next prime is 27780275005591. The reversal of 27780275005555 is 55550057208772.

It is not a de Polignac number, because 27780275005555 - 2³ = 27780275005547 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27780275005555.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 601411740 + ... + 601457929.

It is an arithmetic number, because the mean of its divisors is an integer number (2165165406000).

Almost surely, 2^{27780275005555} is an apocalyptic number.

27780275005555 is a deficient number, since it is larger than the sum of its proper divisors (6862371490445).

27780275005555 is a wasteful number, since it uses less digits than its factorization.

27780275005555 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1202869854.

The product of its (nonzero) digits is 34300000, while the sum is 58.

The spelling of 27780275005555 in words is "twenty-seven trillion, seven hundred eighty billion, two hundred seventy-five million, five thousand, five hundred fifty-five".