27644266749 has 16 divisors (see below), whose sum is σ = 40231019520. Its totient is φ = 16745277360.

The previous prime is 27644266739. The next prime is 27644266787. The reversal of 27644266749 is 94766244672.

It is not a de Polignac number, because 27644266749 - 2¹³ = 27644258557 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27644266739) 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, 156709 + ... + 282570.

It is an arithmetic number, because the mean of its divisors is an integer number (2514438720).

Almost surely, 2^27644266749 is an apocalyptic number.

It is an amenable number.

27644266749 is a deficient number, since it is larger than the sum of its proper divisors (12586752771).

27644266749 is a wasteful number, since it uses less digits than its factorization.

27644266749 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 441200.

The product of its digits is 24385536, while the sum is 57.

The spelling of 27644266749 in words is "twenty-seven billion, six hundred forty-four million, two hundred sixty-six thousand, seven hundred forty-nine".