891989164934 has 16 divisors (see below), whose sum is σ = 1533744001536. Its totient is φ = 381126141000.

The previous prime is 891989164901. The next prime is 891989164993. The reversal of 891989164934 is 439461989198.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 96239342 + ... + 96248609.

It is an arithmetic number, because the mean of its divisors is an integer number (95859000096).

Almost surely, 2^891989164934 is an apocalyptic number.

891989164934 is a deficient number, since it is larger than the sum of its proper divisors (641754836602).

891989164934 is a wasteful number, since it uses less digits than its factorization.

891989164934 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 192488291.

The product of its digits is 120932352, while the sum is 71.

The spelling of 891989164934 in words is "eight hundred ninety-one billion, nine hundred eighty-nine million, one hundred sixty-four thousand, nine hundred thirty-four".