161169355590144 has 1280 divisors, whose sum is σ = 535100351385600. Its totient is φ = 42495262064640.

The previous prime is 161169355590107. The next prime is 161169355590157. The reversal of 161169355590144 is 441095553961161.

It is a super-2 number, since 2×161169355590144² (a number of 29 digits) contains 22 as substring.

It is an unprimeable number.

It is a polite number, since it can be written in 127 ways as a sum of consecutive naturals, for example, 27555024532 + ... + 27555030380.

It is an arithmetic number, because the mean of its divisors is an integer number (418047149520).

Almost surely, 2^{161169355590144} is an apocalyptic number.

It is an amenable number.

It is a practical number, because each smaller number is the sum of distinct divisors of 161169355590144, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (267550175692800).

161169355590144 is an abundant number, since it is smaller than the sum of its proper divisors (373930995795456).

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

161169355590144 is a wasteful number, since it uses less digits than its factorization.

161169355590144 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6061 (or 6045 counting only the distinct ones).

The product of its (nonzero) digits is 17496000, while the sum is 60.

The spelling of 161169355590144 in words is "one hundred sixty-one trillion, one hundred sixty-nine billion, three hundred fifty-five million, five hundred ninety thousand, one hundred forty-four".