27056467021 has 4 divisors (see below), whose sum is σ = 27057214332. Its totient is φ = 27055719712.

The previous prime is 27056466991. The next prime is 27056467037. The reversal of 27056467021 is 12076465072.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18527020996 + 8529446025 = 136114^2 + 92355^2 .

It is a cyclic number.

It is not a de Polignac number, because 27056467021 - 2¹¹ = 27056464973 is a prime.

It is a super-2 number, since 2×27056467021² (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 (27056464021) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 316426 + ... + 392731.

It is an arithmetic number, because the mean of its divisors is an integer number (6764303583).

Almost surely, 2^27056467021 is an apocalyptic number.

It is an amenable number.

27056467021 is a deficient number, since it is larger than the sum of its proper divisors (747311).

27056467021 is an equidigital number, since it uses as much as digits as its factorization.

27056467021 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 747310.

The product of its (nonzero) digits is 141120, while the sum is 40.

The spelling of 27056467021 in words is "twenty-seven billion, fifty-six million, four hundred sixty-seven thousand, twenty-one".