27731272770631 has 4 divisors (see below), whose sum is σ = 27731301842272. Its totient is φ = 27731243698992.

The previous prime is 27731272770613. The next prime is 27731272770689. The reversal of 27731272770631 is 13607727213772.

It is a happy number.

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 27731272770631 - 2³³ = 27722682836039 is a prime.

It is a super-2 number, since 2×27731272770631² (a number of 28 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27731272770031) 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, 13054671 + ... + 15029536.

It is an arithmetic number, because the mean of its divisors is an integer number (6932825460568).

Almost surely, 2^{27731272770631} is an apocalyptic number.

27731272770631 is a deficient number, since it is larger than the sum of its proper divisors (29071641).

27731272770631 is an equidigital number, since it uses as much as digits as its factorization.

27731272770631 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 29071640.

The product of its (nonzero) digits is 7260624, while the sum is 55.

The spelling of 27731272770631 in words is "twenty-seven trillion, seven hundred thirty-one billion, two hundred seventy-two million, seven hundred seventy thousand, six hundred thirty-one".