161692461617 has 4 divisors (see below), whose sum is σ = 161923122036. Its totient is φ = 161461801200.

The previous prime is 161692461599. The next prime is 161692461631. The reversal of 161692461617 is 716164296161.

161692461617 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 143579608561 + 18112853056 = 378919^2 + 134584^2 .

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-161692461617 is a prime.

It is a super-2 number, since 2×161692461617² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (161692461517) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (19) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 115329158 + ... + 115330559.

It is an arithmetic number, because the mean of its divisors is an integer number (40480780509).

Almost surely, 2^161692461617 is an apocalyptic number.

It is an amenable number.

161692461617 is a deficient number, since it is larger than the sum of its proper divisors (230660419).

161692461617 is an equidigital number, since it uses as much as digits as its factorization.

161692461617 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 230660418.

The product of its digits is 653184, while the sum is 50.

The spelling of 161692461617 in words is "one hundred sixty-one billion, six hundred ninety-two million, four hundred sixty-one thousand, six hundred seventeen".