891330068638 has 8 divisors (see below), whose sum is σ = 1338544346688. Its totient is φ = 445148619744.

The previous prime is 891330068617. The next prime is 891330068639. The reversal of 891330068638 is 836860033198.

891330068638 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

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

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (891330068639) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 258205131 + ... + 258208582.

It is an arithmetic number, because the mean of its divisors is an integer number (167318043336).

Almost surely, 2^891330068638 is an apocalyptic number.

891330068638 is a deficient number, since it is larger than the sum of its proper divisors (447214278050).

891330068638 is a wasteful number, since it uses less digits than its factorization.

891330068638 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 516414578.

The product of its (nonzero) digits is 4478976, while the sum is 55.

The spelling of 891330068638 in words is "eight hundred ninety-one billion, three hundred thirty million, sixty-eight thousand, six hundred thirty-eight".