27826693891 has 8 divisors (see below), whose sum is σ = 28694177568. Its totient is φ = 26968200000.

The previous prime is 27826693889. The next prime is 27826693907. The reversal of 27826693891 is 19839662872.

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

It is a cyclic number.

It is not a de Polignac number, because 27826693891 - 2¹ = 27826693889 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27826693801) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2241160 + ... + 2253541.

It is an arithmetic number, because the mean of its divisors is an integer number (3586772196).

Almost surely, 2^27826693891 is an apocalyptic number.

27826693891 is a deficient number, since it is larger than the sum of its proper divisors (867483677).

27826693891 is a wasteful number, since it uses less digits than its factorization.

27826693891 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 4494893.

The product of its digits is 15676416, while the sum is 61.

The spelling of 27826693891 in words is "twenty-seven billion, eight hundred twenty-six million, six hundred ninety-three thousand, eight hundred ninety-one".