27705006457 has 4 divisors (see below), whose sum is σ = 27713995920. Its totient is φ = 27696016996.

The previous prime is 27705006451. The next prime is 27705006491. The reversal of 27705006457 is 75460050772.

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 27705006457 - 2¹⁵ = 27704973689 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27705006451) 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, 4490107 + ... + 4496272.

It is an arithmetic number, because the mean of its divisors is an integer number (6928498980).

Almost surely, 2^27705006457 is an apocalyptic number.

It is an amenable number.

27705006457 is a deficient number, since it is larger than the sum of its proper divisors (8989463).

27705006457 is an equidigital number, since it uses as much as digits as its factorization.

27705006457 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 8989462.

The product of its (nonzero) digits is 411600, while the sum is 43.

The spelling of 27705006457 in words is "twenty-seven billion, seven hundred five million, six thousand, four hundred fifty-seven".