161336448 has 448 divisors, whose sum is σ = 624321600. Its totient is φ = 40310784.

The previous prime is 161336447. The next prime is 161336449. The reversal of 161336448 is 844633161.

It is a happy number.

161336448 is a `hidden beast` number, since 1 + 6 + 1 + 3 + 3 + 644 + 8 = 666.

It is an interprime number because it is at equal distance from previous prime (161336447) and next prime (161336449).

It is a tau number, because it is divible by the number of its divisors (448).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is a nude number because it is divisible by every one of its digits.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161336447) by changing a digit.

It is a polite number, since it can be written in 55 ways as a sum of consecutive naturals, for example, 8491383 + ... + 8491401.

It is an arithmetic number, because the mean of its divisors is an integer number (1393575).

Almost surely, 2^161336448 is an apocalyptic number.

161336448 is a gapful number since it is divisible by the number (18) 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 161336448, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (312160800).

161336448 is an abundant number, since it is smaller than the sum of its proper divisors (462985152).

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

161336448 is an equidigital number, since it uses as much as digits as its factorization.

161336448 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 71 (or 44 counting only the distinct ones).

The product of its digits is 41472, while the sum is 36.

The square root of 161336448 is about 12701.8285297826. The cubic root of 161336448 is about 544.3908667286.

The spelling of 161336448 in words is "one hundred sixty-one million, three hundred thirty-six thousand, four hundred forty-eight".