165153351561 has 16 divisors (see below), whose sum is σ = 254353825728. Its totient is φ = 94205120000.

The previous prime is 165153351479. The next prime is 165153351563.

165153351561 is nontrivially palindromic in base 10.

165153351561 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a cyclic number.

It is not a de Polignac number, because 165153351561 - 2¹⁵ = 165153318793 is a prime.

It is a super-2 number, since 2×165153351561² (a number of 23 digits) contains 22 as substring.

It is a Smith number, since the sum of its digits (42) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is not an unprimeable number, because it can be changed into a prime (165153351563) 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 15 ways as a sum of consecutive naturals, for example, 147194940 + ... + 147196061.

It is an arithmetic number, because the mean of its divisors is an integer number (15897114108).

Almost surely, 2^165153351561 is an apocalyptic number.

165153351561 is a gapful number since it is divisible by the number (11) formed by its first and last digit.

It is an amenable number.

165153351561 is a deficient number, since it is larger than the sum of its proper divisors (89200474167).

165153351561 is a wasteful number, since it uses less digits than its factorization.

165153351561 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 294391032.

The product of its digits is 202500, while the sum is 42.

The spelling of 165153351561 in words is "one hundred sixty-five billion, one hundred fifty-three million, three hundred fifty-one thousand, five hundred sixty-one".