815769168 has 80 divisors (see below), whose sum is σ = 2184145920. Its totient is φ = 262184832.

The previous prime is 815769151. The next prime is 815769179. The reversal of 815769168 is 861967518.

It is a self number, because there is not a number n which added to its sum of digits gives 815769168.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 160555 + ... + 165557.

It is an arithmetic number, because the mean of its divisors is an integer number (27301824).

Almost surely, 2^815769168 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 815769168, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (1092072960).

815769168 is an abundant number, since it is smaller than the sum of its proper divisors (1368376752).

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

815769168 is a wasteful number, since it uses less digits than its factorization.

815769168 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 5136 (or 5130 counting only the distinct ones).

The product of its digits is 725760, while the sum is 51.

The square root of 815769168 is about 28561.6730602393. The cubic root of 815769168 is about 934.3776227381.

The spelling of 815769168 in words is "eight hundred fifteen million, seven hundred sixty-nine thousand, one hundred sixty-eight".