8165621430792 has 192 divisors, whose sum is σ = 25946945256960. Its totient is φ = 2271212697600.

The previous prime is 8165621430781. The next prime is 8165621430797. The reversal of 8165621430792 is 2970341265618.

It is a happy number.

8165621430792 is a `hidden beast` number, since 8 + 1 + 6 + 5 + 621 + 4 + 3 + 0 + 7 + 9 + 2 = 666.

It is a super-3 number, since 3×8165621430792³ (a number of 40 digits) contains 333 as substring.

It is not an unprimeable number, because it can be changed into a prime (8165621430797) by changing a digit.

It is a polite number, since it can be written in 47 ways as a sum of consecutive naturals, for example, 9140692 + ... + 9994172.

It is an arithmetic number, because the mean of its divisors is an integer number (135140339880).

It is a 1-persistent number, because it is pandigital, but 2⋅8165621430792 = 16331242861584 is not.

Almost surely, 2^{8165621430792} is an apocalyptic number.

8165621430792 is a gapful number since it is divisible by the number (82) formed by its first and last digit.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 8165621430792, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (12973472628480).

8165621430792 is an abundant number, since it is smaller than the sum of its proper divisors (17781323826168).

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

8165621430792 is a wasteful number, since it uses less digits than its factorization.

8165621430792 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 854004 (or 853997 counting only the distinct ones).

The product of its (nonzero) digits is 4354560, while the sum is 54.

The spelling of 8165621430792 in words is "eight trillion, one hundred sixty-five billion, six hundred twenty-one million, four hundred thirty thousand, seven hundred ninety-two".