27747708857 has 8 divisors (see below), whose sum is σ = 30280668480. Its totient is φ = 25216489360.

The previous prime is 27747708841. The next prime is 27747708883. The reversal of 27747708857 is 75880774772.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 27747708857 - 2⁴ = 27747708841 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 27747708857.

It is not an unprimeable number, because it can be changed into a prime (27747701857) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 401573 + ... + 465570.

It is an arithmetic number, because the mean of its divisors is an integer number (3785083560).

Almost surely, 2^27747708857 is an apocalyptic number.

It is an amenable number.

27747708857 is a deficient number, since it is larger than the sum of its proper divisors (2532959623).

27747708857 is a wasteful number, since it uses less digits than its factorization.

27747708857 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 870063.

The product of its (nonzero) digits is 43025920, while the sum is 62.

The spelling of 27747708857 in words is "twenty-seven billion, seven hundred forty-seven million, seven hundred eight thousand, eight hundred fifty-seven".