27243969989 has 16 divisors (see below), whose sum is σ = 28483228800. Its totient is φ = 26025174336.

The previous prime is 27243969979. The next prime is 27243969997. The reversal of 27243969989 is 98996934272.

It is a cyclic number.

It is not a de Polignac number, because 27243969989 - 2⁸ = 27243969733 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 (27243969919) 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, 3828767 + ... + 3835875.

It is an arithmetic number, because the mean of its divisors is an integer number (1780201800).

Almost surely, 2^27243969989 is an apocalyptic number.

27243969989 is a gapful number since it is divisible by the number (29) formed by its first and last digit.

It is an amenable number.

27243969989 is a deficient number, since it is larger than the sum of its proper divisors (1239258811).

27243969989 is a wasteful number, since it uses less digits than its factorization.

27243969989 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8524.

The product of its digits is 105815808, while the sum is 68.

The spelling of 27243969989 in words is "twenty-seven billion, two hundred forty-three million, nine hundred sixty-nine thousand, nine hundred eighty-nine".