161632576 has 112 divisors (see below), whose sum is σ = 386080000. Its totient is φ = 67060224.

The previous prime is 161632561. The next prime is 161632579. The reversal of 161632576 is 675236161.

It is a tau number, because it is divible by the number of its divisors (112).

It is a super-2 number, since 2×161632576² = 52250179248791552, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (37).

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (161632579) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 812125 + ... + 812323.

Almost surely, 2^161632576 is an apocalyptic number.

161632576 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 161632576, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (193040000).

161632576 is an abundant number, since it is smaller than the sum of its proper divisors (224447424).

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

161632576 is an equidigital number, since it uses as much as digits as its factorization.

161632576 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 269 (or 245 counting only the distinct ones).

The product of its digits is 45360, while the sum is 37.

The square root of 161632576 is about 12713.4800900462. The cubic root of 161632576 is about 544.7237339540.

The spelling of 161632576 in words is "one hundred sixty-one million, six hundred thirty-two thousand, five hundred seventy-six".