165734689161 has 8 divisors (see below), whose sum is σ = 221317994880. Its totient is φ = 110320588112.

The previous prime is 165734689157. The next prime is 165734689193. The reversal of 165734689161 is 161986437561.

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

It is a cyclic number.

It is not a de Polignac number, because 165734689161 - 2² = 165734689157 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165734689061) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 42298881 + ... + 42302798.

It is an arithmetic number, because the mean of its divisors is an integer number (27664749360).

Almost surely, 2^165734689161 is an apocalyptic number.

It is an amenable number.

165734689161 is a deficient number, since it is larger than the sum of its proper divisors (55583305719).

165734689161 is an equidigital number, since it uses as much as digits as its factorization.

165734689161 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 84602335.

The product of its digits is 6531840, while the sum is 57.

The spelling of 165734689161 in words is "one hundred sixty-five billion, seven hundred thirty-four million, six hundred eighty-nine thousand, one hundred sixty-one".