161206056000 has 672 divisors, whose sum is σ = 636431178240. Its totient is φ = 38624256000.

The previous prime is 161206055981. The next prime is 161206056029. The reversal of 161206056000 is 650602161.

It is a happy number.

It is an unprimeable number.

It is a polite number, since it can be written in 95 ways as a sum of consecutive naturals, for example, 70486857 + ... + 70489143.

Almost surely, 2^161206056000 is an apocalyptic number.

161206056000 is a gapful number since it is divisible by the number (10) 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 161206056000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (318215589120).

161206056000 is an abundant number, since it is smaller than the sum of its proper divisors (475225122240).

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

161206056000 is a wasteful number, since it uses less digits than its factorization.

161206056000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 2420 (or 2397 counting only the distinct ones).

The product of its (nonzero) digits is 2160, while the sum is 27.

Adding to 161206056000 its reverse (650602161), we get a palindrome (161856658161).

The spelling of 161206056000 in words is "one hundred sixty-one billion, two hundred six million, fifty-six thousand".