869161764 has 48 divisors (see below), whose sum is σ = 2144076480. Its totient is φ = 273277440.

The previous prime is 869161763. The next prime is 869161781. The reversal of 869161764 is 467161968.

It is a happy number.

It is not an unprimeable number, because it can be changed into a prime (869161763) 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, 44944 + ... + 61304.

It is an arithmetic number, because the mean of its divisors is an integer number (44668260).

Almost surely, 2^869161764 is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 869161764, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1072038240).

869161764 is an abundant number, since it is smaller than the sum of its proper divisors (1274914716).

It is a pseudoperfect number, because it is the sum of a subset of its proper divisors.

869161764 is a wasteful number, since it uses less digits than its factorization.

869161764 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 16620 (or 16618 counting only the distinct ones).

The product of its digits is 435456, while the sum is 48.

The square root of 869161764 is about 29481.5495522199. The cubic root of 869161764 is about 954.3335770743. Note that the first 3 decimals are identical.

The spelling of 869161764 in words is "eight hundred sixty-nine million, one hundred sixty-one thousand, seven hundred sixty-four".