27440678131 has 4 divisors (see below), whose sum is σ = 27494589600. Its totient is φ = 27386766664.

The previous prime is 27440678119. The next prime is 27440678137. The reversal of 27440678131 is 13187604472.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 27440678131 - 2¹¹ = 27440676083 is a prime.

It is a super-2 number, since 2×27440678131² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27440678137) 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, 26954971 + ... + 26955988.

It is an arithmetic number, because the mean of its divisors is an integer number (6873647400).

Almost surely, 2^27440678131 is an apocalyptic number.

27440678131 is a deficient number, since it is larger than the sum of its proper divisors (53911469).

27440678131 is an equidigital number, since it uses as much as digits as its factorization.

27440678131 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 53911468.

The product of its (nonzero) digits is 225792, while the sum is 43.

The spelling of 27440678131 in words is "twenty-seven billion, four hundred forty million, six hundred seventy-eight thousand, one hundred thirty-one".