161998496 has 48 divisors (see below), whose sum is σ = 353172960. Its totient is φ = 72526080.

The previous prime is 161998481. The next prime is 161998511. The reversal of 161998496 is 694899161.

It is a happy number.

161998496 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is an interprime number because it is at equal distance from previous prime (161998481) and next prime (161998511).

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 20150 + ... + 27018.

It is an arithmetic number, because the mean of its divisors is an integer number (7357770).

Almost surely, 2^161998496 is an apocalyptic number.

161998496 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 161998496, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (176586480).

161998496 is an abundant number, since it is smaller than the sum of its proper divisors (191174464).

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

161998496 is a wasteful number, since it uses less digits than its factorization.

161998496 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6957 (or 6949 counting only the distinct ones).

The product of its digits is 839808, while the sum is 53.

The square root of 161998496 is about 12727.8629785208. The cubic root of 161998496 is about 545.1344908386.

The spelling of 161998496 in words is "one hundred sixty-one million, nine hundred ninety-eight thousand, four hundred ninety-six".