165420920439 has 8 divisors (see below), whose sum is σ = 245068030320. Its totient is φ = 110280613608.

The previous prime is 165420920437. The next prime is 165420920447. The reversal of 165420920439 is 934029024561.

165420920439 is a `hidden beast` number, since 1 + 6 + 5 + 4 + 209 + 2 + 0 + 439 = 666.

It is not a de Polignac number, because 165420920439 - 2¹ = 165420920437 is a prime.

It is a junction number, because it is equal to n+sod(n) for n = 165420920394 and 165420920403.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165420920437) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (23) of ones.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 3063350352 + ... + 3063350405.

It is an arithmetic number, because the mean of its divisors is an integer number (30633503790).

Almost surely, 2^165420920439 is an apocalyptic number.

165420920439 is a deficient number, since it is larger than the sum of its proper divisors (79647109881).

165420920439 is an equidigital number, since it uses as much as digits as its factorization.

165420920439 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 6126700766 (or 6126700760 counting only the distinct ones).

The product of its (nonzero) digits is 466560, while the sum is 45.

The spelling of 165420920439 in words is "one hundred sixty-five billion, four hundred twenty million, nine hundred twenty thousand, four hundred thirty-nine".