27555380104 has 72 divisors (see below), whose sum is σ = 63845276490. Its totient is φ = 11114729472.

The previous prime is 27555380063. The next prime is 27555380107. The reversal of 27555380104 is 40108355572.

It can be written as a sum of positive squares in 3 ways, for example, as 27555336004 + 44100 = 165998^2 + 210^2 .

It is not an unprimeable number, because it can be changed into a prime (27555380107) 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 in 17 ways as a sum of consecutive naturals, for example, 8329 + ... + 234904.

Almost surely, 2^27555380104 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 27555380104, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (31922638245).

27555380104 is an abundant number, since it is smaller than the sum of its proper divisors (36289896386).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

27555380104 is a wasteful number, since it uses less digits than its factorization.

27555380104 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 243287 (or 243259 counting only the distinct ones).

The product of its (nonzero) digits is 168000, while the sum is 40.

The spelling of 27555380104 in words is "twenty-seven billion, five hundred fifty-five million, three hundred eighty thousand, one hundred four".