27991835194 has 4 divisors (see below), whose sum is σ = 41987752794. Its totient is φ = 13995917596.

The previous prime is 27991835191. The next prime is 27991835239. The reversal of 27991835194 is 49153819972.

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., 27773889025 + 217946169 = 166655^2 + 14763^2 .

It is not an unprimeable number, because it can be changed into a prime (27991835191) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6997958797 + ... + 6997958800.

Almost surely, 2^27991835194 is an apocalyptic number.

27991835194 is a deficient number, since it is larger than the sum of its proper divisors (13995917600).

27991835194 is a wasteful number, since it uses less digits than its factorization.

27991835194 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13995917599.

The product of its digits is 4898880, while the sum is 58.

The spelling of 27991835194 in words is "twenty-seven billion, nine hundred ninety-one million, eight hundred thirty-five thousand, one hundred ninety-four".