27731845253 has 4 divisors (see below), whose sum is σ = 31693537440. Its totient is φ = 23770153068.

The previous prime is 27731845241. The next prime is 27731845277. The reversal of 27731845253 is 35254813772.

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 a cyclic number.

It is not a de Polignac number, because 27731845253 - 2⁸ = 27731844997 is a prime.

It is a super-2 number, since 2×27731845253² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27731845198 and 27731845207.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27731845753) 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, 1980846083 + ... + 1980846096.

It is an arithmetic number, because the mean of its divisors is an integer number (7923384360).

Almost surely, 2^27731845253 is an apocalyptic number.

It is an amenable number.

27731845253 is a deficient number, since it is larger than the sum of its proper divisors (3961692187).

27731845253 is an equidigital number, since it uses as much as digits as its factorization.

27731845253 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3961692186.

The product of its digits is 1411200, while the sum is 47.

The spelling of 27731845253 in words is "twenty-seven billion, seven hundred thirty-one million, eight hundred forty-five thousand, two hundred fifty-three".