27647999989 has 8 divisors (see below), whose sum is σ = 27720783320. Its totient is φ = 27575251200.

The previous prime is 27647999959. The next prime is 27648000013. The reversal of 27647999989 is 98999974672.

It is a happy number.

It can be written as a sum of positive squares in 4 ways, for example, as 88679889 + 27559320100 = 9417^2 + 166010^2 .

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27647999989 - 2²⁵ = 27614445557 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27647999909) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 2571577 + ... + 2582305.

It is an arithmetic number, because the mean of its divisors is an integer number (3465097915).

Almost surely, 2^27647999989 is an apocalyptic number.

It is an amenable number.

27647999989 is a deficient number, since it is larger than the sum of its proper divisors (72783331).

27647999989 is a wasteful number, since it uses less digits than its factorization.

27647999989 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 17271.

The product of its digits is 1111065984, while the sum is 79.

The spelling of 27647999989 in words is "twenty-seven billion, six hundred forty-seven million, nine hundred ninety-nine thousand, nine hundred eighty-nine".