27805505029 has 8 divisors (see below), whose sum is σ = 27895517208. Its totient is φ = 27715537920.

The previous prime is 27805504933. The next prime is 27805505033. The reversal of 27805505029 is 92050550872.

It can be written as a sum of positive squares in 4 ways, for example, as 57608100 + 27747896929 = 7590^2 + 166577^2 .

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 27805505029 - 2¹¹ = 27805502981 is a prime.

It is a super-2 number, since 2×27805505029² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27805505089) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1582239 + ... + 1599715.

It is an arithmetic number, because the mean of its divisors is an integer number (3486939651).

Almost surely, 2^27805505029 is an apocalyptic number.

It is an amenable number.

27805505029 is a deficient number, since it is larger than the sum of its proper divisors (90012179).

27805505029 is a wasteful number, since it uses less digits than its factorization.

27805505029 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 22535.

The product of its (nonzero) digits is 252000, while the sum is 43.

The spelling of 27805505029 in words is "twenty-seven billion, eight hundred five million, five hundred five thousand, twenty-nine".