27809678341 has 4 divisors (see below), whose sum is σ = 27812653452. Its totient is φ = 27806703232.

The previous prime is 27809678333. The next prime is 27809678357. The reversal of 27809678341 is 14387690872.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 2091141441 + 25718536900 = 45729^2 + 160370^2 .

It is a cyclic number.

It is not a de Polignac number, because 27809678341 - 2³ = 27809678333 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 (27809678041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 1473490 + ... + 1492243.

It is an arithmetic number, because the mean of its divisors is an integer number (6953163363).

Almost surely, 2^27809678341 is an apocalyptic number.

It is an amenable number.

27809678341 is a deficient number, since it is larger than the sum of its proper divisors (2975111).

27809678341 is an equidigital number, since it uses as much as digits as its factorization.

27809678341 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2975110.

The product of its (nonzero) digits is 4064256, while the sum is 55.

The spelling of 27809678341 in words is "twenty-seven billion, eight hundred nine million, six hundred seventy-eight thousand, three hundred forty-one".