8161560 has 160 divisors (see below), whose sum is σ = 30056400. Its totient is φ = 1969920.

The previous prime is 8161537. The next prime is 8161579. The reversal of 8161560 is 651618.

It is a super-2 number, since 2×8161560² = 133222123267200, which contains 22 as substring.

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

It is an Ulam number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 39 ways as a sum of consecutive naturals, for example, 35526 + ... + 35754.

Almost surely, 2^8161560 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 8161560, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (15028200).

8161560 is an abundant number, since it is smaller than the sum of its proper divisors (21894840).

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

8161560 is a wasteful number, since it uses less digits than its factorization.

8161560 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 263 (or 250 counting only the distinct ones).

The product of its (nonzero) digits is 1440, while the sum is 27.

The square root of 8161560 is about 2856.8444129844. The cubic root of 8161560 is about 201.3373705997.

The spelling of 8161560 in words is "eight million, one hundred sixty-one thousand, five hundred sixty".