27389993061 has 4 divisors (see below), whose sum is σ = 36519990752. Its totient is φ = 18259995372.

The previous prime is 27389993041. The next prime is 27389993083. The reversal of 27389993061 is 16039998372.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is not a de Polignac number, because 27389993061 - 2⁹ = 27389992549 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27389992992 and 27389993010.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (27389993041) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 4564998841 + ... + 4564998846.

It is an arithmetic number, because the mean of its divisors is an integer number (9129997688).

Almost surely, 2^27389993061 is an apocalyptic number.

It is an amenable number.

27389993061 is a deficient number, since it is larger than the sum of its proper divisors (9129997691).

27389993061 is an equidigital number, since it uses as much as digits as its factorization.

27389993061 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9129997690.

The product of its (nonzero) digits is 4408992, while the sum is 57.

The spelling of 27389993061 in words is "twenty-seven billion, three hundred eighty-nine million, nine hundred ninety-three thousand, sixty-one".