27706764417 has 4 divisors (see below), whose sum is σ = 36942352560. Its totient is φ = 18471176276.

The previous prime is 27706764409. The next prime is 27706764419. The reversal of 27706764417 is 71446760772.

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 27706764417 - 2³ = 27706764409 is a prime.

It is a self number, because there is not a number n which added to its sum of digits gives 27706764417.

It is not an unprimeable number, because it can be changed into a prime (27706764419) 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, 4617794067 + ... + 4617794072.

It is an arithmetic number, because the mean of its divisors is an integer number (9235588140).

Almost surely, 2^27706764417 is an apocalyptic number.

It is an amenable number.

27706764417 is a deficient number, since it is larger than the sum of its proper divisors (9235588143).

27706764417 is an equidigital number, since it uses as much as digits as its factorization.

27706764417 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9235588142.

The product of its (nonzero) digits is 2765952, while the sum is 51.

The spelling of 27706764417 in words is "twenty-seven billion, seven hundred six million, seven hundred sixty-four thousand, four hundred seventeen".