67894640356 has 27 divisors (see below), whose sum is σ = 125416493769. Its totient is φ = 32155928928.

The previous prime is 67894640353. The next prime is 67894640369. The reversal of 67894640356 is 65304649876.

It is a happy number.

The square root of 67894640356 is 260566.

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

It can be written as a sum of positive squares in only one way, i.e., 494172900 + 67400467456 = 22230^2 + 259616^2 .

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 67894640356.

It is not an unprimeable number, because it can be changed into a prime (67894640353) 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, 9898080 + ... + 9904936.

Almost surely, 2^67894640356 is an apocalyptic number.

67894640356 is the 260566-th square number.

It is an amenable number.

67894640356 is a deficient number, since it is larger than the sum of its proper divisors (57521853413).

67894640356 is an frugal number, since it uses more digits than its factorization.

67894640356 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 13756 (or 6878 counting only the distinct ones).

The product of its (nonzero) digits is 26127360, while the sum is 58.

The spelling of 67894640356 in words is "sixty-seven billion, eight hundred ninety-four million, six hundred forty thousand, three hundred fifty-six".