161656115529 has 8 divisors (see below), whose sum is σ = 215889699040. Its totient is φ = 107596637856.

The previous prime is 161656115513. The next prime is 161656115557. The reversal of 161656115529 is 925511656161.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 161656115529 - 2⁴ = 161656115513 is a prime.

It is a super-3 number, since 3×161656115529³ (a number of 35 digits) contains 333 as substring. Note that it is a super-d number also for d = 2.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161656115729) by changing a digit.

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 7 ways as a sum of consecutive naturals, for example, 43524292 + ... + 43528005.

It is an arithmetic number, because the mean of its divisors is an integer number (26986212380).

Almost surely, 2^161656115529 is an apocalyptic number.

It is an amenable number.

161656115529 is a deficient number, since it is larger than the sum of its proper divisors (54233583511).

161656115529 is an equidigital number, since it uses as much as digits as its factorization.

161656115529 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 87052919.

The product of its digits is 486000, while the sum is 48.

The spelling of 161656115529 in words is "one hundred sixty-one billion, six hundred fifty-six million, one hundred fifteen thousand, five hundred twenty-nine".