27728617607 has 2 divisors, whose sum is σ = 27728617608. Its totient is φ = 27728617606.

The previous prime is 27728617603. The next prime is 27728617711. The reversal of 27728617607 is 70671682772.

It is a weak prime.

It is a cyclic number.

It is not a de Polignac number, because 27728617607 - 2² = 27728617603 is a prime.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (27728617603) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 13864308803 + 13864308804.

It is an arithmetic number, because the mean of its divisors is an integer number (13864308804).

Almost surely, 2^27728617607 is an apocalyptic number.

27728617607 is a deficient number, since it is larger than the sum of its proper divisors (1).

27728617607 is an equidigital number, since it uses as much as digits as its factorization.

27728617607 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 2765952, while the sum is 53.

The spelling of 27728617607 in words is "twenty-seven billion, seven hundred twenty-eight million, six hundred seventeen thousand, six hundred seven".