67409294689 has 9 divisors (see below), whose sum is σ = 74097653329. Its totient is φ = 61278580660.

The previous prime is 67409294681. The next prime is 67409294707. The reversal of 67409294689 is 98649290476.

It is a happy number.

The square root of 67409294689 is 259633.

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

It is not a de Polignac number, because 67409294689 - 2³ = 67409294681 is a prime.

It is a Duffinian number.

It is a self number, because there is not a number n which added to its sum of digits gives 67409294689.

It is not an unprimeable number, because it can be changed into a prime (67409294681) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 8 ways as a sum of consecutive naturals, for example, 2844162 + ... + 2867764.

Almost surely, 2^67409294689 is an apocalyptic number.

67409294689 is the 259633-rd square number.

67409294689 is the 129817-th centered octagonal number.

It is an amenable number.

67409294689 is a deficient number, since it is larger than the sum of its proper divisors (6688358640).

67409294689 is an frugal number, since it uses more digits than its factorization.

67409294689 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 47228 (or 23614 counting only the distinct ones).

The product of its (nonzero) digits is 47029248, while the sum is 64.

Multiplying 67409294689 by its sum of digits (64), we get a square (4314194860096 = 2077064²).

The spelling of 67409294689 in words is "sixty-seven billion, four hundred nine million, two hundred ninety-four thousand, six hundred eighty-nine".