161960919120000 has 11520 divisors, whose sum is σ = 874676141539200. Its totient is φ = 29262643200000.

The previous prime is 161960919119981. The next prime is 161960919120047. The reversal of 161960919120000 is 21919069161.

161960919120000 is a `hidden beast` number, since 1 + 6 + 1 + 9 + 609 + 19 + 1 + 20 + 0 + 0 + 0 = 666.

It is a Harshad number since it is a multiple of its sum of digits (45).

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 1439 ways as a sum of consecutive naturals, for example, 3950266319980 + ... + 3950266320020.

Almost surely, 2^{161960919120000} is an apocalyptic number.

161960919120000 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 161960919120000, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (437338070769600).

161960919120000 is an abundant number, since it is smaller than the sum of its proper divisors (712715222419200).

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

161960919120000 is a wasteful number, since it uses less digits than its factorization.

161960919120000 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 157 (or 111 counting only the distinct ones).

The product of its (nonzero) digits is 52488, while the sum is 45.

The spelling of 161960919120000 in words is "one hundred sixty-one trillion, nine hundred sixty billion, nine hundred nineteen million, one hundred twenty thousand".