27664505794 has 4 divisors (see below), whose sum is σ = 41496758694. Its totient is φ = 13832252896.

The previous prime is 27664505779. The next prime is 27664505797. The reversal of 27664505794 is 49750546672.

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., 27262302769 + 402203025 = 165113^2 + 20055^2 .

It is not an unprimeable number, because it can be changed into a prime (27664505797) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6916126447 + ... + 6916126450.

Almost surely, 2^27664505794 is an apocalyptic number.

27664505794 is a deficient number, since it is larger than the sum of its proper divisors (13832252900).

27664505794 is a wasteful number, since it uses less digits than its factorization.

27664505794 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 13832252899.

The product of its (nonzero) digits is 12700800, while the sum is 55.

The spelling of 27664505794 in words is "twenty-seven billion, six hundred sixty-four million, five hundred five thousand, seven hundred ninety-four".