27380728269 has 32 divisors (see below), whose sum is σ = 41895956480. Its totient is φ = 17655116400.

The previous prime is 27380728267. The next prime is 27380728321. The reversal of 27380728269 is 96282708372.

It is not a de Polignac number, because 27380728269 - 2¹ = 27380728267 is a prime.

It is a super-2 number, since 2×27380728269² (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 (27380728261) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (13) of ones.

It is a polite number, since it can be written in 31 ways as a sum of consecutive naturals, for example, 1675074 + ... + 1691340.

It is an arithmetic number, because the mean of its divisors is an integer number (1309248640).

Almost surely, 2^27380728269 is an apocalyptic number.

It is an amenable number.

27380728269 is a deficient number, since it is larger than the sum of its proper divisors (14515228211).

27380728269 is a wasteful number, since it uses less digits than its factorization.

27380728269 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 18318 (or 18312 counting only the distinct ones).

The product of its (nonzero) digits is 4064256, while the sum is 54.

The spelling of 27380728269 in words is "twenty-seven billion, three hundred eighty million, seven hundred twenty-eight thousand, two hundred sixty-nine".