27641606780068 has 12 divisors (see below), whose sum is σ = 48377163189852. Its totient is φ = 13819560154400.

The previous prime is 27641606780057. The next prime is 27641606780069. The reversal of 27641606780068 is 86008760614672.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 10813824479844 + 16827782300224 = 3288438^2 + 4102168^2 .

It is a junction number, because it is equal to n+sod(n) for n = 27641606779988 and 27641606780015.

It is not an unprimeable number, because it can be changed into a prime (27641606780069) 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 3 ways as a sum of consecutive naturals, for example, 310758883 + ... + 310847818.

It is an arithmetic number, because the mean of its divisors is an integer number (4031430265821).

Almost surely, 2^{27641606780068} is an apocalyptic number.

It is an amenable number.

27641606780068 is a deficient number, since it is larger than the sum of its proper divisors (20735556409784).

27641606780068 is a wasteful number, since it uses less digits than its factorization.

27641606780068 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 621617822 (or 621617820 counting only the distinct ones).

The product of its (nonzero) digits is 32514048, while the sum is 61.

The spelling of 27641606780068 in words is "twenty-seven trillion, six hundred forty-one billion, six hundred six million, seven hundred eighty thousand, sixty-eight".