27684940805 has 8 divisors (see below), whose sum is σ = 33245515800. Its totient is φ = 22132228096.

The previous prime is 27684940739. The next prime is 27684940807. The reversal of 27684940805 is 50804948672.

It can be written as a sum of positive squares in 4 ways, for example, as 351262564 + 27333678241 = 18742^2 + 165329^2 .

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 27684940805 - 2¹² = 27684936709 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27684940807) 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, 1957820 + ... + 1971909.

It is an arithmetic number, because the mean of its divisors is an integer number (4155689475).

Almost surely, 2^27684940805 is an apocalyptic number.

It is an amenable number.

27684940805 is a deficient number, since it is larger than the sum of its proper divisors (5560574995).

27684940805 is a wasteful number, since it uses less digits than its factorization.

27684940805 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 3931143.

The product of its (nonzero) digits is 3870720, while the sum is 53.

The spelling of 27684940805 in words is "twenty-seven billion, six hundred eighty-four million, nine hundred forty thousand, eight hundred five".