67634844489 has 9 divisors (see below), whose sum is σ = 97695902343. Its totient is φ = 45089376192.

The previous prime is 67634844481. The next prime is 67634844533. The reversal of 67634844489 is 98444843676.

The square root of 67634844489 is 260067.

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

67634844489 is a `hidden beast` number, since 6 + 76 + 3 + 4 + 84 + 4 + 489 = 666.

It can be written as a sum of positive squares in only one way, i.e., 4312154889 + 63322689600 = 65667^2 + 251640^2 .

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

It is not a de Polignac number, because 67634844489 - 2³ = 67634844481 is a prime.

It is a super-2 number, since 2×67634844489² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (67634844481) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 736857 + ... + 823545.

Almost surely, 2^67634844489 is an apocalyptic number.

67634844489 is the 260067-th square number.

67634844489 is the 130034-th centered octagonal number.

It is an amenable number.

67634844489 is a deficient number, since it is larger than the sum of its proper divisors (30061057854).

67634844489 is an frugal number, since it uses more digits than its factorization.

67634844489 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 173384 (or 86692 counting only the distinct ones).

The product of its digits is 111476736, while the sum is 63.

The spelling of 67634844489 in words is "sixty-seven billion, six hundred thirty-four million, eight hundred forty-four thousand, four hundred eighty-nine".