27657054721 has 4 divisors (see below), whose sum is σ = 29112689200. Its totient is φ = 26201420244.

The previous prime is 27657054629. The next prime is 27657054727. The reversal of 27657054721 is 12745075672.

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 a cyclic number.

It is not a de Polignac number, because 27657054721 - 2¹⁷ = 27656923649 is a prime.

It is not an unprimeable number, because it can be changed into a prime (27657054727) 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, 727817211 + ... + 727817248.

It is an arithmetic number, because the mean of its divisors is an integer number (7278172300).

Almost surely, 2^27657054721 is an apocalyptic number.

It is an amenable number.

27657054721 is a deficient number, since it is larger than the sum of its proper divisors (1455634479).

27657054721 is a wasteful number, since it uses less digits than its factorization.

27657054721 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1455634478.

The product of its (nonzero) digits is 823200, while the sum is 46.

The spelling of 27657054721 in words is "twenty-seven billion, six hundred fifty-seven million, fifty-four thousand, seven hundred twenty-one".