27154727809 has 4 divisors (see below), whose sum is σ = 29623339440. Its totient is φ = 24686116180.

The previous prime is 27154727783. The next prime is 27154727833. The reversal of 27154727809 is 90872745172.

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 not a de Polignac number, because 27154727809 - 2¹⁷ = 27154596737 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27154727839) 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 3 ways as a sum of consecutive naturals, for example, 1234305799 + ... + 1234305820.

It is an arithmetic number, because the mean of its divisors is an integer number (7405834860).

Almost surely, 2^27154727809 is an apocalyptic number.

It is an amenable number.

27154727809 is a deficient number, since it is larger than the sum of its proper divisors (2468611631).

27154727809 is a wasteful number, since it uses less digits than its factorization.

27154727809 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2468611630.

The product of its (nonzero) digits is 1975680, while the sum is 52.

The spelling of 27154727809 in words is "twenty-seven billion, one hundred fifty-four million, seven hundred twenty-seven thousand, eight hundred nine".