27945705371 has 4 divisors (see below), whose sum is σ = 28046592672. Its totient is φ = 27844818072.

The previous prime is 27945705353. The next prime is 27945705373. The reversal of 27945705371 is 17350754972.

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

It is a cyclic number.

It is not a de Polignac number, because 27945705371 - 2¹⁴ = 27945688987 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27945705373) by changing a digit.

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, 50443235 + ... + 50443788.

It is an arithmetic number, because the mean of its divisors is an integer number (7011648168).

Almost surely, 2^27945705371 is an apocalyptic number.

27945705371 is a deficient number, since it is larger than the sum of its proper divisors (100887301).

27945705371 is a wasteful number, since it uses less digits than its factorization.

27945705371 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 100887300.

The product of its (nonzero) digits is 1852200, while the sum is 50.

The spelling of 27945705371 in words is "twenty-seven billion, nine hundred forty-five million, seven hundred five thousand, three hundred seventy-one".