65847495934609 has 27 divisors (see below), whose sum is σ = 67506395655153. Its totient is φ = 64229053934400.

The previous prime is 65847495934541. The next prime is 65847495934613. The reversal of 65847495934609 is 90643959474856.

The square root of 65847495934609 is 8114647.

It is a perfect power (a square), and thus also a powerful number.

It can be written as a sum of positive squares in 4 ways, for example, as 16043028890625 + 49804467043984 = 4005375^2 + 7057228^2 .

It is not a de Polignac number, because 65847495934609 - 2³³ = 65838906000017 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (65847495964609) by changing a digit.

It is a polite number, since it can be written in 26 ways as a sum of consecutive naturals, for example, 67814104494 + ... + 67814105464.

Almost surely, 2^{65847495934609} is an apocalyptic number.

65847495934609 is the 8114647-th square number.

65847495934609 is the 4057324-th centered octagonal number.

It is an amenable number.

65847495934609 is a deficient number, since it is larger than the sum of its proper divisors (1658899720544).

65847495934609 is an frugal number, since it uses more digits than its factorization.

65847495934609 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2338 (or 1169 counting only the distinct ones).

The product of its (nonzero) digits is 7054387200, while the sum is 79.

The spelling of 65847495934609 in words is "sixty-five trillion, eight hundred forty-seven billion, four hundred ninety-five million, nine hundred thirty-four thousand, six hundred nine".