161622080 has 56 divisors (see below), whose sum is σ = 387434328. Its totient is φ = 64217088.

The previous prime is 161622047. The next prime is 161622089. The reversal of 161622080 is 80226161.

It can be written as a sum of positive squares in 4 ways, for example, as 30382144 + 131239936 = 5512^2 + 11456^2 .

It is a super-2 number, since 2×161622080² = 52243393487052800, which contains 22 as substring.

It is not an unprimeable number, because it can be changed into a prime (161622089) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 48632 + ... + 51848.

Almost surely, 2^161622080 is an apocalyptic number.

161622080 is a gapful number since it is divisible by the number (10) 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 161622080, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193717164).

161622080 is an abundant number, since it is smaller than the sum of its proper divisors (225812248).

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

161622080 is a wasteful number, since it uses less digits than its factorization.

161622080 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3391 (or 3381 counting only the distinct ones).

The product of its (nonzero) digits is 1152, while the sum is 26.

The square root of 161622080 is about 12713.0672931437. The cubic root of 161622080 is about 544.7119427170.

The spelling of 161622080 in words is "one hundred sixty-one million, six hundred twenty-two thousand, eighty".