27116778658 has 4 divisors (see below), whose sum is σ = 40675167990. Its totient is φ = 13558389328.

The previous prime is 27116778641. The next prime is 27116778713. The reversal of 27116778658 is 85687761172.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 20179054809 + 6937723849 = 142053^2 + 83293^2 .

It is a Smith number, since the sum of its digits (58) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6779194663 + ... + 6779194666.

Almost surely, 2^27116778658 is an apocalyptic number.

27116778658 is a deficient number, since it is larger than the sum of its proper divisors (13558389332).

27116778658 is a wasteful number, since it uses less digits than its factorization.

27116778658 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13558389331.

The product of its digits is 7902720, while the sum is 58.

The spelling of 27116778658 in words is "twenty-seven billion, one hundred sixteen million, seven hundred seventy-eight thousand, six hundred fifty-eight".