27778089449 has 8 divisors (see below), whose sum is σ = 30524564448. Its totient is φ = 25068480160.

The previous prime is 27778089343. The next prime is 27778089463. The reversal of 27778089449 is 94498087772.

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-27778089449 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27778089149) 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, 9214847 + ... + 9217860.

It is an arithmetic number, because the mean of its divisors is an integer number (3815570556).

Almost surely, 2^27778089449 is an apocalyptic number.

It is an amenable number.

27778089449 is a deficient number, since it is larger than the sum of its proper divisors (2746474999).

27778089449 is a wasteful number, since it uses less digits than its factorization.

27778089449 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 18432855.

The product of its (nonzero) digits is 56899584, while the sum is 65.

The spelling of 27778089449 in words is "twenty-seven billion, seven hundred seventy-eight million, eighty-nine thousand, four hundred forty-nine".