161005600 has 72 divisors (see below), whose sum is σ = 449221248. Its totient is φ = 55200000.

The previous prime is 161005591. The next prime is 161005613. The reversal of 161005600 is 6500161.

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, 8776 + ... + 19975.

It is an arithmetic number, because the mean of its divisors is an integer number (6239184).

Almost surely, 2^161005600 is an apocalyptic number.

161005600 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161005600 is an abundant number, since it is smaller than the sum of its proper divisors (288215648).

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

161005600 is a wasteful number, since it uses less digits than its factorization.

161005600 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 28778 (or 28765 counting only the distinct ones).

The product of its (nonzero) digits is 180, while the sum is 19.

The square root of 161005600 is about 12688.7982094444. The cubic root of 161005600 is about 544.0184898560.

Adding to 161005600 its reverse (6500161), we get a palindrome (167505761).

The spelling of 161005600 in words is "one hundred sixty-one million, five thousand, six hundred".