27097809781 has 8 divisors (see below), whose sum is σ = 31035816704. Its totient is φ = 23176525680.

The previous prime is 27097809779. The next prime is 27097809811. The reversal of 27097809781 is 18790879072.

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

It is not a de Polignac number, because 27097809781 - 2¹ = 27097809779 is a prime.

It is a super-2 number, since 2×27097809781² (a number of 22 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27097801781) 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, 4177230 + ... + 4183711.

It is an arithmetic number, because the mean of its divisors is an integer number (3879477088).

Almost surely, 2^27097809781 is an apocalyptic number.

It is an amenable number.

27097809781 is a deficient number, since it is larger than the sum of its proper divisors (3938006923).

27097809781 is an equidigital number, since it uses as much as digits as its factorization.

27097809781 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8361411.

The product of its (nonzero) digits is 3556224, while the sum is 58.

The spelling of 27097809781 in words is "twenty-seven billion, ninety-seven million, eight hundred nine thousand, seven hundred eighty-one".