27910720649 has 8 divisors (see below), whose sum is σ = 33774317568. Its totient is φ = 22516211520.

The previous prime is 27910720631. The next prime is 27910720693. The reversal of 27910720649 is 94602701972.

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 27910720649 - 2²⁰ = 27909672073 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27910720609) 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, 117271817 + ... + 117272054.

It is an arithmetic number, because the mean of its divisors is an integer number (4221789696).

Almost surely, 2^27910720649 is an apocalyptic number.

It is an amenable number.

27910720649 is a deficient number, since it is larger than the sum of its proper divisors (5863596919).

27910720649 is a wasteful number, since it uses less digits than its factorization.

27910720649 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 234543895.

The product of its (nonzero) digits is 381024, while the sum is 47.

The spelling of 27910720649 in words is "twenty-seven billion, nine hundred ten million, seven hundred twenty thousand, six hundred forty-nine".