27140249281 has 4 divisors (see below), whose sum is σ = 27140781232. Its totient is φ = 27139717332.

The previous prime is 27140249273. The next prime is 27140249291. The reversal of 27140249281 is 18294204172.

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 27140249281 - 2³ = 27140249273 is a prime.

It is a super-2 number, since 2×27140249281² (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 (27140249221) 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, 180231 + ... + 294556.

It is an arithmetic number, because the mean of its divisors is an integer number (6785195308).

Almost surely, 2^27140249281 is an apocalyptic number.

It is an amenable number.

27140249281 is a deficient number, since it is larger than the sum of its proper divisors (531951).

27140249281 is an equidigital number, since it uses as much as digits as its factorization.

27140249281 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 531950.

The product of its (nonzero) digits is 64512, while the sum is 40.

The spelling of 27140249281 in words is "twenty-seven billion, one hundred forty million, two hundred forty-nine thousand, two hundred eighty-one".