8165523456 has 114 divisors (see below), whose sum is σ = 23596060722. Its totient is φ = 2721054720.

The previous prime is 8165523439. The next prime is 8165523461. The reversal of 8165523456 is 6543255618.

8165523456 is a `hidden beast` number, since 8 + 16 + 552 + 34 + 56 = 666.

It can be written as a sum of positive squares in only one way, i.e., 5898240000 + 2267283456 = 76800^2 + 47616^2 .

It is a super-3 number, since 3×8165523456³ (a number of 31 digits) contains 333 as substring.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 2357566 + ... + 2361026.

Almost surely, 2^8165523456 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 8165523456, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (11798030361).

8165523456 is an abundant number, since it is smaller than the sum of its proper divisors (15430537266).

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

8165523456 is an frugal number, since it uses more digits than its factorization.

8165523456 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3503 (or 3466 counting only the distinct ones).

The product of its digits is 864000, while the sum is 45.

The square root of 8165523456 is about 90363.2859960283. The cubic root of 8165523456 is about 2013.6995679926.

It can be divided in two parts, 81655 and 23456, that added together give a triangular number (105111 = T₄₅₈).

The spelling of 8165523456 in words is "eight billion, one hundred sixty-five million, five hundred twenty-three thousand, four hundred fifty-six".