27027327731 has 4 divisors (see below), whose sum is σ = 27064200672. Its totient is φ = 26990454792.

The previous prime is 27027327721. The next prime is 27027327739. The reversal of 27027327731 is 13772372072.

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

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27027327731 is a prime.

It is a super-2 number, since 2×27027327731² (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 (27027327739) 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, 18435371 + ... + 18436836.

It is an arithmetic number, because the mean of its divisors is an integer number (6766050168).

Almost surely, 2^27027327731 is an apocalyptic number.

27027327731 is a deficient number, since it is larger than the sum of its proper divisors (36872941).

27027327731 is an equidigital number, since it uses as much as digits as its factorization.

27027327731 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 36872940.

The product of its (nonzero) digits is 172872, while the sum is 41.

The spelling of 27027327731 in words is "twenty-seven billion, twenty-seven million, three hundred twenty-seven thousand, seven hundred thirty-one".