27408252869 has 4 divisors (see below), whose sum is σ = 27408730380. Its totient is φ = 27407775360.

The previous prime is 27408252857. The next prime is 27408252871. The reversal of 27408252869 is 96825280472.

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 17580108100 + 9828144769 = 132590^2 + 99137^2 .

It is a cyclic number.

It is not a de Polignac number, because 27408252869 - 2⁴ = 27408252853 is a prime.

It is a super-2 number, since 2×27408252869² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a self number, because there is not a number n which added to its sum of digits gives 27408252869.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27408252829) 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 3 ways as a sum of consecutive naturals, for example, 138674 + ... + 272115.

It is an arithmetic number, because the mean of its divisors is an integer number (6852182595).

Almost surely, 2^27408252869 is an apocalyptic number.

It is an amenable number.

27408252869 is a deficient number, since it is larger than the sum of its proper divisors (477511).

27408252869 is an equidigital number, since it uses as much as digits as its factorization.

27408252869 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 477510.

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

The spelling of 27408252869 in words is "twenty-seven billion, four hundred eight million, two hundred fifty-two thousand, eight hundred sixty-nine".