27809880817 has 8 divisors (see below), whose sum is σ = 27995780736. Its totient is φ = 27624600432.

The previous prime is 27809880811. The next prime is 27809880823. The reversal of 27809880817 is 71808890872.

It is a happy number.

It is an interprime number because it is at equal distance from previous prime (27809880811) and next prime (27809880823).

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 27809880817 - 2³ = 27809880809 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27809880811) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 64633 + ... + 244534.

It is an arithmetic number, because the mean of its divisors is an integer number (3499472592).

Almost surely, 2^27809880817 is an apocalyptic number.

It is an amenable number.

27809880817 is a deficient number, since it is larger than the sum of its proper divisors (185899919).

27809880817 is a wasteful number, since it uses less digits than its factorization.

27809880817 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 309767.

The product of its (nonzero) digits is 3612672, while the sum is 58.

The spelling of 27809880817 in words is "twenty-seven billion, eight hundred nine million, eight hundred eighty thousand, eight hundred seventeen".