161960200 has 24 divisors (see below), whose sum is σ = 376557930. Its totient is φ = 64784000.

The previous prime is 161960177. The next prime is 161960233. The reversal of 161960200 is 2069161.

It can be written as a sum of positive squares in 3 ways, for example, as 156400036 + 5560164 = 12506^2 + 2358^2 .

It is a super-2 number, since 2×161960200² = 52462212768080000, which contains 22 as substring.

It is a Harshad number since it is a multiple of its sum of digits (25).

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 5 ways as a sum of consecutive naturals, for example, 404701 + ... + 405100.

Almost surely, 2^161960200 is an apocalyptic number.

161960200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161960200 is an abundant number, since it is smaller than the sum of its proper divisors (214597730).

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

161960200 is a wasteful number, since it uses less digits than its factorization.

161960200 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 809817 (or 809808 counting only the distinct ones).

The product of its (nonzero) digits is 648, while the sum is 25.

The square root of 161960200 is about 12726.3584736562. The cubic root of 161960200 is about 545.0915313540.

The spelling of 161960200 in words is "one hundred sixty-one million, nine hundred sixty thousand, two hundred".