161220096 has 120 divisors (see below), whose sum is σ = 473976360. Its totient is φ = 52740096.

The previous prime is 161220089. The next prime is 161220131. The reversal of 161220096 is 690022161.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 11 ways as a sum of consecutive naturals, for example, 271576 + ... + 272168.

It is an arithmetic number, because the mean of its divisors is an integer number (3949803).

Almost surely, 2^161220096 is an apocalyptic number.

161220096 is a gapful number since it is divisible by the number (16) 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 161220096, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (236988180).

161220096 is an abundant number, since it is smaller than the sum of its proper divisors (312756264).

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

161220096 is an equidigital number, since it uses as much as digits as its factorization.

161220096 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 676 (or 657 counting only the distinct ones).

The product of its (nonzero) digits is 1296, while the sum is 27.

The square root of 161220096 is about 12697.2475757544. The cubic root of 161220096 is about 544.2599680183.

The spelling of 161220096 in words is "one hundred sixty-one million, two hundred twenty thousand, ninety-six".