27665556394 has 16 divisors (see below), whose sum is σ = 49488697728. Its totient is φ = 11341159632.

The previous prime is 27665556383. The next prime is 27665556437. The reversal of 27665556394 is 49365556672.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42958617 + ... + 42959260.

It is an arithmetic number, because the mean of its divisors is an integer number (3093043608).

Almost surely, 2^27665556394 is an apocalyptic number.

27665556394 is a deficient number, since it is larger than the sum of its proper divisors (21823141334).

27665556394 is a wasteful number, since it uses less digits than its factorization.

27665556394 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 85917909.

The product of its digits is 40824000, while the sum is 58.

The spelling of 27665556394 in words is "twenty-seven billion, six hundred sixty-five million, five hundred fifty-six thousand, three hundred ninety-four".