161959827043684 has 12 divisors (see below), whose sum is σ = 293203135165500. Its totient is φ = 78187502710688.

The previous prime is 161959827043673. The next prime is 161959827043741. The reversal of 161959827043684 is 486340728959161.

It can be written as a sum of positive squares in 2 ways, for example, as 37020191074084 + 124939635969600 = 6084422^2 + 11177640^2 .

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 698102702659 + ... + 698102702890.

It is an arithmetic number, because the mean of its divisors is an integer number (24433594597125).

It is a 2-persistent number, because it is pandigital, and so is 2⋅161959827043684 = 323919654087368, but 3⋅161959827043684 = 485879481131052 is not.

Almost surely, 2^{161959827043684} is an apocalyptic number.

It is an amenable number.

161959827043684 is a deficient number, since it is larger than the sum of its proper divisors (131243308121816).

161959827043684 is a wasteful number, since it uses less digits than its factorization.

161959827043684 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 1396205405582 (or 1396205405580 counting only the distinct ones).

The product of its (nonzero) digits is 627056640, while the sum is 73.

The spelling of 161959827043684 in words is "one hundred sixty-one trillion, nine hundred fifty-nine billion, eight hundred twenty-seven million, forty-three thousand, six hundred eighty-four".