27147707731 has 4 divisors (see below), whose sum is σ = 27285513552. Its totient is φ = 27009901912.

The previous prime is 27147707723. The next prime is 27147707761. The reversal of 27147707731 is 13770774172.

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 27147707731 - 2³ = 27147707723 is a prime.

It is a super-2 number, since 2×27147707731² (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 (27147707761) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 68902615 + ... + 68903008.

It is an arithmetic number, because the mean of its divisors is an integer number (6821378388).

Almost surely, 2^27147707731 is an apocalyptic number.

27147707731 is a deficient number, since it is larger than the sum of its proper divisors (137805821).

27147707731 is a wasteful number, since it uses less digits than its factorization.

27147707731 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 137805820.

The product of its (nonzero) digits is 403368, while the sum is 46.

The spelling of 27147707731 in words is "twenty-seven billion, one hundred forty-seven million, seven hundred seven thousand, seven hundred thirty-one".