165450409623 has 8 divisors (see below), whose sum is σ = 245111718000. Its totient is φ = 110300273064.

The previous prime is 165450409613. The next prime is 165450409651. The reversal of 165450409623 is 326904054561.

165450409623 is a `hidden beast` number, since 1 + 6 + 54 + 504 + 0 + 96 + 2 + 3 = 666.

It is not a de Polignac number, because 165450409623 - 2⁶ = 165450409559 is a prime.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165450409603) 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, 3063896448 + ... + 3063896501.

It is an arithmetic number, because the mean of its divisors is an integer number (30638964750).

Almost surely, 2^165450409623 is an apocalyptic number.

165450409623 is a deficient number, since it is larger than the sum of its proper divisors (79661308377).

165450409623 is an equidigital number, since it uses as much as digits as its factorization.

165450409623 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 6127792958 (or 6127792952 counting only the distinct ones).

The product of its (nonzero) digits is 777600, while the sum is 45.

The spelling of 165450409623 in words is "one hundred sixty-five billion, four hundred fifty million, four hundred nine thousand, six hundred twenty-three".