27695961745 has 4 divisors (see below), whose sum is σ = 33235154100. Its totient is φ = 22156769392.

The previous prime is 27695961739. The next prime is 27695961767. The reversal of 27695961745 is 54716959672.

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 7070119056 + 20625842689 = 84084^2 + 143617^2 .

It is a cyclic number.

It is not a de Polignac number, because 27695961745 - 2³ = 27695961737 is a prime.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 2769596170 + ... + 2769596179.

It is an arithmetic number, because the mean of its divisors is an integer number (8308788525).

Almost surely, 2^27695961745 is an apocalyptic number.

It is an amenable number.

27695961745 is a deficient number, since it is larger than the sum of its proper divisors (5539192355).

27695961745 is an equidigital number, since it uses as much as digits as its factorization.

27695961745 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 5539192354.

The product of its digits is 28576800, while the sum is 61.

The spelling of 27695961745 in words is "twenty-seven billion, six hundred ninety-five million, nine hundred sixty-one thousand, seven hundred forty-five".