27444292981 has 16 divisors (see below), whose sum is σ = 31441737600. Its totient is φ = 23466124800.

The previous prime is 27444292979. The next prime is 27444292991. The reversal of 27444292981 is 18929244472.

It is a cyclic number.

It is not a de Polignac number, because 27444292981 - 2¹ = 27444292979 is a prime.

It is a super-2 number, since 2×27444292981² (a number of 22 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27444292951) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 10166970 + ... + 10169668.

It is an arithmetic number, because the mean of its divisors is an integer number (1965108600).

Almost surely, 2^27444292981 is an apocalyptic number.

It is an amenable number.

27444292981 is a deficient number, since it is larger than the sum of its proper divisors (3997444619).

27444292981 is a wasteful number, since it uses less digits than its factorization.

27444292981 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5724.

The product of its digits is 2322432, while the sum is 52.

The spelling of 27444292981 in words is "twenty-seven billion, four hundred forty-four million, two hundred ninety-two thousand, nine hundred eighty-one".