165315147505 has 8 divisors (see below), whose sum is σ = 198640239912. Its totient is φ = 132077409408.

The previous prime is 165315147469. The next prime is 165315147589. The reversal of 165315147505 is 505741513561.

It can be written as a sum of positive squares in 4 ways, for example, as 13311852129 + 152003295376 = 115377^2 + 389876^2 .

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 165315147505 - 2⁷ = 165315147377 is a prime.

It is a Duffinian number.

It is an unprimeable number.

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, 21834412 + ... + 21841981.

It is an arithmetic number, because the mean of its divisors is an integer number (24830029989).

Almost surely, 2^165315147505 is an apocalyptic number.

It is an amenable number.

165315147505 is a deficient number, since it is larger than the sum of its proper divisors (33325092407).

165315147505 is an equidigital number, since it uses as much as digits as its factorization.

165315147505 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 43677155.

The product of its (nonzero) digits is 315000, while the sum is 43.

The spelling of 165315147505 in words is "one hundred sixty-five billion, three hundred fifteen million, one hundred forty-seven thousand, five hundred five".