67494481209 has 9 divisors (see below), whose sum is σ = 97493154213. Its totient is φ = 44995801212.

The previous prime is 67494481207. The next prime is 67494481211. The reversal of 67494481209 is 90218449476.

The square root of 67494481209 is 259797.

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

67494481209 is a `hidden beast` number, since 6 + 74 + 9 + 448 + 120 + 9 = 666.

It is an interprime number because it is at equal distance from previous prime (67494481207) and next prime (67494481211).

It is a tau number, because it is divible by the number of its divisors (9).

It is not a de Polignac number, because 67494481209 - 2¹ = 67494481207 is a prime.

It is a Curzon number.

It is not an unprimeable number, because it can be changed into a prime (67494481207) by changing a digit.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 736092 + ... + 822690.

Almost surely, 2^67494481209 is an apocalyptic number.

67494481209 is the 259797-th square number.

67494481209 is the 129899-th centered octagonal number.

It is an amenable number.

67494481209 is a deficient number, since it is larger than the sum of its proper divisors (29998673004).

67494481209 is an frugal number, since it uses more digits than its factorization.

67494481209 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 173204 (or 86602 counting only the distinct ones).

The product of its (nonzero) digits is 3483648, while the sum is 54.

The spelling of 67494481209 in words is "sixty-seven billion, four hundred ninety-four million, four hundred eighty-one thousand, two hundred nine".