27012012881 has 12 divisors (see below), whose sum is σ = 31552533540. Its totient is φ = 23057072640.

The previous prime is 27012012847. The next prime is 27012012883. The reversal of 27012012881 is 18821021072.

It is a happy number.

It can be written as a sum of positive squares in 2 ways, for example, as 19492348225 + 7519664656 = 139615^2 + 86716^2 .

It is not a de Polignac number, because 27012012881 - 2¹⁸ = 27011750737 is a prime.

It is a super-2 number, since 2×27012012881² (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 (27012012883) by changing a digit.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 1131896 + ... + 1155513.

It is an arithmetic number, because the mean of its divisors is an integer number (2629377795).

Almost surely, 2^27012012881 is an apocalyptic number.

It is an amenable number.

27012012881 is a deficient number, since it is larger than the sum of its proper divisors (4540520659).

27012012881 is a wasteful number, since it uses less digits than its factorization.

27012012881 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2287664 (or 2287657 counting only the distinct ones).

The product of its (nonzero) digits is 3584, while the sum is 32.

The spelling of 27012012881 in words is "twenty-seven billion, twelve million, twelve thousand, eight hundred eighty-one".