161287853228816 has 80 divisors (see below), whose sum is σ = 332036165468160. Its totient is φ = 75681026064000.

The previous prime is 161287853228783. The next prime is 161287853228833. The reversal of 161287853228816 is 618822358782161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 586895441 + ... + 587170191.

It is an arithmetic number, because the mean of its divisors is an integer number (4150452068352).

Almost surely, 2^{161287853228816} is an apocalyptic number.

161287853228816 is a gapful number since it is divisible by the number (16) 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 161287853228816, and also a Zumkeller number, because its divisors can be partitioned in two sets with the same sum (166018082734080).

161287853228816 is an abundant number, since it is smaller than the sum of its proper divisors (170748312239344).

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

161287853228816 is a wasteful number, since it uses less digits than its factorization.

161287853228816 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 292932 (or 292926 counting only the distinct ones).

The product of its digits is 123863040, while the sum is 68.

The spelling of 161287853228816 in words is "one hundred sixty-one trillion, two hundred eighty-seven billion, eight hundred fifty-three million, two hundred twenty-eight thousand, eight hundred sixteen".