27427398644 has 6 divisors (see below), whose sum is σ = 47997947634. Its totient is φ = 13713699320.

The previous prime is 27427398629. The next prime is 27427398671. The reversal of 27427398644 is 44689372472.

It can be written as a sum of positive squares in only one way, i.e., 24784204900 + 2643193744 = 157430^2 + 51412^2 .

It is a self number, because there is not a number n which added to its sum of digits gives 27427398644.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 3428424827 + ... + 3428424834.

It is an arithmetic number, because the mean of its divisors is an integer number (7999657939).

Almost surely, 2^27427398644 is an apocalyptic number.

It is an amenable number.

27427398644 is a deficient number, since it is larger than the sum of its proper divisors (20570548990).

27427398644 is a wasteful number, since it uses less digits than its factorization.

27427398644 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6856849665 (or 6856849663 counting only the distinct ones).

The product of its digits is 16257024, while the sum is 56.

The spelling of 27427398644 in words is "twenty-seven billion, four hundred twenty-seven million, three hundred ninety-eight thousand, six hundred forty-four".