27657566494 has 4 divisors (see below), whose sum is σ = 41486349744. Its totient is φ = 13828783246.

The previous prime is 27657566479. The next prime is 27657566537. The reversal of 27657566494 is 49466575672.

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

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 6914391622 + ... + 6914391625.

It is an arithmetic number, because the mean of its divisors is an integer number (10371587436).

Almost surely, 2^27657566494 is an apocalyptic number.

27657566494 is a deficient number, since it is larger than the sum of its proper divisors (13828783250).

27657566494 is a wasteful number, since it uses less digits than its factorization.

27657566494 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13828783249.

The product of its digits is 76204800, while the sum is 61.

The spelling of 27657566494 in words is "twenty-seven billion, six hundred fifty-seven million, five hundred sixty-six thousand, four hundred ninety-four".