161768016016 has 20 divisors (see below), whose sum is σ = 331862327532. Its totient is φ = 76126125056.

The previous prime is 161768015993. The next prime is 161768016061. The reversal of 161768016016 is 610610867161.

It can be written as a sum of positive squares in 2 ways, for example, as 149490489600 + 12277526416 = 386640^2 + 110804^2 .

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (11) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 297367405 + ... + 297367948.

Almost surely, 2^161768016016 is an apocalyptic number.

161768016016 is a gapful number since it is divisible by the number (16) formed by its first and last digit.

It is an amenable number.

161768016016 is an abundant number, since it is smaller than the sum of its proper divisors (170094311516).

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

161768016016 is a wasteful number, since it uses less digits than its factorization.

161768016016 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 594735378 (or 594735372 counting only the distinct ones).

The product of its (nonzero) digits is 72576, while the sum is 43.

The spelling of 161768016016 in words is "one hundred sixty-one billion, seven hundred sixty-eight million, sixteen thousand, sixteen".