27056771657 has 4 divisors (see below), whose sum is σ = 27057732996. Its totient is φ = 27055810320.

The previous prime is 27056771629. The next prime is 27056771659. The reversal of 27056771657 is 75617765072.

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 25773412681 + 1283358976 = 160541^2 + 35824^2 .

It is a cyclic number.

It is not a de Polignac number, because 27056771657 - 2¹⁰ = 27056770633 is a prime.

It is a Duffinian number.

It is a junction number, because it is equal to n+sod(n) for n = 27056771599 and 27056771608.

It is not an unprimeable number, because it can be changed into a prime (27056771659) 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, 437138 + ... + 495179.

It is an arithmetic number, because the mean of its divisors is an integer number (6764433249).

Almost surely, 2^27056771657 is an apocalyptic number.

It is an amenable number.

27056771657 is a deficient number, since it is larger than the sum of its proper divisors (961339).

27056771657 is an equidigital number, since it uses as much as digits as its factorization.

27056771657 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 961338.

The product of its (nonzero) digits is 4321800, while the sum is 53.

The spelling of 27056771657 in words is "twenty-seven billion, fifty-six million, seven hundred seventy-one thousand, six hundred fifty-seven".