68894236641 has 8 divisors (see below), whose sum is σ = 91860988320. Its totient is φ = 45928488032.

The previous prime is 68894236603. The next prime is 68894236643. The reversal of 68894236641 is 14663249886.

It is a sphenic number, since it is the product of 3 distinct primes.

It is a cyclic number.

It is not a de Polignac number, because 68894236641 - 2¹⁹ = 68893712353 is a prime.

It is a super-2 number, since 2×68894236641² (a number of 22 digits) contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (68894236643) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 72375 + ... + 378188.

It is an arithmetic number, because the mean of its divisors is an integer number (11482623540).

Almost surely, 2^68894236641 is an apocalyptic number.

It is an amenable number.

68894236641 is a deficient number, since it is larger than the sum of its proper divisors (22966751679).

68894236641 is a wasteful number, since it uses less digits than its factorization.

68894236641 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 501535.

The product of its digits is 11943936, while the sum is 57.

The spelling of 68894236641 in words is "sixty-eight billion, eight hundred ninety-four million, two hundred thirty-six thousand, six hundred forty-one".