161277112200 has 96 divisors (see below), whose sum is σ = 500038308000. Its totient is φ = 43000412160.

The previous prime is 161277112187. The next prime is 161277112247. The reversal of 161277112200 is 2211772161.

It is a Harshad number since it is a multiple of its sum of digits (30).

It is an unprimeable number.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 4601944 + ... + 4636856.

It is an arithmetic number, because the mean of its divisors is an integer number (5208732375).

Almost surely, 2^161277112200 is an apocalyptic number.

161277112200 is a gapful number since it is divisible by the number (10) formed by its first and last digit.

It is an amenable number.

161277112200 is an abundant number, since it is smaller than the sum of its proper divisors (338761195800).

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

161277112200 is a wasteful number, since it uses less digits than its factorization.

161277112200 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 42631 (or 42622 counting only the distinct ones).

The product of its (nonzero) digits is 2352, while the sum is 30.

Adding to 161277112200 its reverse (2211772161), we get a palindrome (163488884361).

The spelling of 161277112200 in words is "one hundred sixty-one billion, two hundred seventy-seven million, one hundred twelve thousand, two hundred".