27551804813 has 8 divisors (see below), whose sum is σ = 29705019288. Its totient is φ = 25403425344.

The previous prime is 27551804779. The next prime is 27551804827. The reversal of 27551804813 is 31840815572.

It can be written as a sum of positive squares in 4 ways, for example, as 4635294889 + 22916509924 = 68083^2 + 151382^2 .

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-27551804813 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 (27551804843) 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, 1196906 + ... + 1219707.

It is an arithmetic number, because the mean of its divisors is an integer number (3713127411).

Almost surely, 2^27551804813 is an apocalyptic number.

It is an amenable number.

27551804813 is a deficient number, since it is larger than the sum of its proper divisors (2153214475).

27551804813 is a wasteful number, since it uses less digits than its factorization.

27551804813 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2417503.

The product of its (nonzero) digits is 268800, while the sum is 44.

The spelling of 27551804813 in words is "twenty-seven billion, five hundred fifty-one million, eight hundred four thousand, eight hundred thirteen".