27738979693 has 8 divisors (see below), whose sum is σ = 28542650400. Its totient is φ = 26942517168.

The previous prime is 27738979627. The next prime is 27738979729. The reversal of 27738979693 is 39697983772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27738979693 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27738979603) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1794238 + ... + 1809631.

It is an arithmetic number, because the mean of its divisors is an integer number (3567831300).

Almost surely, 2^27738979693 is an apocalyptic number.

It is an amenable number.

27738979693 is a deficient number, since it is larger than the sum of its proper divisors (803670707).

27738979693 is a wasteful number, since it uses less digits than its factorization.

27738979693 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3604091.

The product of its digits is 216040608, while the sum is 70.

The spelling of 27738979693 in words is "twenty-seven billion, seven hundred thirty-eight million, nine hundred seventy-nine thousand, six hundred ninety-three".