27438449349169 has 4 divisors (see below), whose sum is σ = 27694883455344. Its totient is φ = 27182015242996.

The previous prime is 27438449349133. The next prime is 27438449349173. The reversal of 27438449349169 is 96194394483472.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 27438449349169 - 2³⁹ = 26888693535281 is a prime.

It is a super-2 number, since 2×27438449349169² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27438449349469) 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, 128217052927 + ... + 128217053140.

It is an arithmetic number, because the mean of its divisors is an integer number (6923720863836).

Almost surely, 2^{27438449349169} is an apocalyptic number.

It is an amenable number.

27438449349169 is a deficient number, since it is larger than the sum of its proper divisors (256434106175).

27438449349169 is a wasteful number, since it uses less digits than its factorization.

27438449349169 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 256434106174.

The product of its digits is 1128701952, while the sum is 73.

The spelling of 27438449349169 in words is "twenty-seven trillion, four hundred thirty-eight billion, four hundred forty-nine million, three hundred forty-nine thousand, one hundred sixty-nine".