161020442560512 has 192 divisors, whose sum is σ = 431193514752000. Its totient is φ = 53435141996544.

The previous prime is 161020442560499. The next prime is 161020442560529. The reversal of 161020442560512 is 215065244020161.

It is a tau number, because it is divible by the number of its divisors (192).

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 1248746539 + ... + 1248875477.

It is an arithmetic number, because the mean of its divisors is an integer number (2245799556000).

Almost surely, 2^{161020442560512} is an apocalyptic number.

161020442560512 is a gapful number since it is divisible by the number (12) 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 161020442560512, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (215596757376000).

161020442560512 is an abundant number, since it is smaller than the sum of its proper divisors (270173072191488).

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

161020442560512 is a wasteful number, since it uses less digits than its factorization.

161020442560512 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 129866 (or 129846 counting only the distinct ones).

The product of its (nonzero) digits is 115200, while the sum is 39.

Adding to 161020442560512 its reverse (215065244020161), we get a palindrome (376085686580673).

The spelling of 161020442560512 in words is "one hundred sixty-one trillion, twenty billion, four hundred forty-two million, five hundred sixty thousand, five hundred twelve".