8161162020 has 576 divisors, whose sum is σ = 29762208000. Its totient is φ = 1852139520.

The previous prime is 8161161977. The next prime is 8161162091. The reversal of 8161162020 is 202611618.

8161162020 is a `hidden beast` number, since 8 + 1 + 6 + 11 + 620 + 20 = 666.

It is a Harshad number since it is a multiple of its sum of digits (27).

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 191 ways as a sum of consecutive naturals, for example, 111796704 + ... + 111796776.

It is an arithmetic number, because the mean of its divisors is an integer number (51670500).

Almost surely, 2^8161162020 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 8161162020, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (14881104000).

8161162020 is an abundant number, since it is smaller than the sum of its proper divisors (21601045980).

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

8161162020 is a wasteful number, since it uses less digits than its factorization.

8161162020 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 201 (or 182 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 27.

The square root of 8161162020 is about 90339.1499849318. The cubic root of 8161162020 is about 2013.3409795942.

Adding to 8161162020 its reverse (202611618), we get a palindrome (8363773638).

The spelling of 8161162020 in words is "eight billion, one hundred sixty-one million, one hundred sixty-two thousand, twenty".