891616980694 has 8 divisors (see below), whose sum is σ = 1459009604808. Its totient is φ = 405280445760.

The previous prime is 891616980691. The next prime is 891616980731. The reversal of 891616980694 is 496089616198.

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 (891616980691) 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, 20264022267 + ... + 20264022310.

It is an arithmetic number, because the mean of its divisors is an integer number (182376200601).

Almost surely, 2^891616980694 is an apocalyptic number.

891616980694 is a deficient number, since it is larger than the sum of its proper divisors (567392624114).

891616980694 is a wasteful number, since it uses less digits than its factorization.

891616980694 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 40528044590.

The product of its (nonzero) digits is 40310784, while the sum is 67.

The spelling of 891616980694 in words is "eight hundred ninety-one billion, six hundred sixteen million, nine hundred eighty thousand, six hundred ninety-four".