161775306000 has 1680 divisors, whose sum is σ = 742372735104. Its totient is φ = 33359040000.

The previous prime is 161775305981. The next prime is 161775306013. The reversal of 161775306000 is 603577161.

161775306000 is a `hidden beast` number, since 1 + 6 + 17 + 7 + 5 + 30 + 600 + 0 = 666.

It is a tau number, because it is divible by the number of its divisors (1680).

It is a Harshad number since it is a multiple of its sum of digits (36).

It is an unprimeable number.

It is a polite number, since it can be written in 335 ways as a sum of consecutive naturals, for example, 1234925935 + ... + 1234926065.

Almost surely, 2^161775306000 is an apocalyptic number.

161775306000 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 161775306000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (371186367552).

161775306000 is an abundant number, since it is smaller than the sum of its proper divisors (580597429104).

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

161775306000 is a wasteful number, since it uses less digits than its factorization.

161775306000 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 201 (or 159 counting only the distinct ones).

The product of its (nonzero) digits is 26460, while the sum is 36.

The spelling of 161775306000 in words is "one hundred sixty-one billion, seven hundred seventy-five million, three hundred six thousand".