889161798721 has 16 divisors (see below), whose sum is σ = 1038003826176. Its totient is φ = 745780686336.

The previous prime is 889161798713. The next prime is 889161798737. The reversal of 889161798721 is 127897161988.

It is not a de Polignac number, because 889161798721 - 2³ = 889161798713 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (889161798221) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1487605 + ... + 1997821.

It is an arithmetic number, because the mean of its divisors is an integer number (64875239136).

Almost surely, 2^889161798721 is an apocalyptic number.

It is an amenable number.

889161798721 is a deficient number, since it is larger than the sum of its proper divisors (148842027455).

889161798721 is a wasteful number, since it uses less digits than its factorization.

889161798721 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 515568.

The product of its digits is 24385536, while the sum is 67.

It can be divided in two parts, 88916179 and 8721, that added together give a square (88924900 = 9430²).

The spelling of 889161798721 in words is "eight hundred eighty-nine billion, one hundred sixty-one million, seven hundred ninety-eight thousand, seven hundred twenty-one".