27962848657 has 4 divisors (see below), whose sum is σ = 27964310836. Its totient is φ = 27961386480.

The previous prime is 27962848651. The next prime is 27962848673. The reversal of 27962848657 is 75684826972.

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

It can be written as a sum of positive squares in 2 ways, for example, as 24566173696 + 3396674961 = 156736^2 + 58281^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-27962848657 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (27962848651) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 702018 + ... + 740779.

It is an arithmetic number, because the mean of its divisors is an integer number (6991077709).

Almost surely, 2^27962848657 is an apocalyptic number.

It is an amenable number.

27962848657 is a deficient number, since it is larger than the sum of its proper divisors (1462179).

27962848657 is a wasteful number, since it uses less digits than its factorization.

27962848657 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 1462178.

The product of its digits is 81285120, while the sum is 64.

The spelling of 27962848657 in words is "twenty-seven billion, nine hundred sixty-two million, eight hundred forty-eight thousand, six hundred fifty-seven".