161841717661488 has 80 divisors (see below), whose sum is σ = 421393769655936. Its totient is φ = 53521306076160.

The previous prime is 161841717661427. The next prime is 161841717661531. The reversal of 161841717661488 is 884166717148161.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 20457531 + ... + 27243237.

Almost surely, 2^{161841717661488} is an apocalyptic number.

It is an amenable number.

161841717661488 is an abundant number, since it is smaller than the sum of its proper divisors (259552051994448).

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

161841717661488 is a wasteful number, since it uses less digits than its factorization.

161841717661488 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6789642 (or 6789636 counting only the distinct ones).

The product of its digits is 86704128, while the sum is 69.

The spelling of 161841717661488 in words is "one hundred sixty-one trillion, eight hundred forty-one billion, seven hundred seventeen million, six hundred sixty-one thousand, four hundred eighty-eight".