165315147506 has 4 divisors (see below), whose sum is σ = 247972721262. Its totient is φ = 82657573752.

The previous prime is 165315147469. The next prime is 165315147589. The reversal of 165315147506 is 605741513561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in only one way, i.e., 163693877281 + 1621270225 = 404591^2 + 40265^2 .

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 as a sum of consecutive naturals, namely, 41328786875 + ... + 41328786878.

Almost surely, 2^165315147506 is an apocalyptic number.

165315147506 is a deficient number, since it is larger than the sum of its proper divisors (82657573756).

165315147506 is an equidigital number, since it uses as much as digits as its factorization.

165315147506 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 82657573755.

The product of its (nonzero) digits is 378000, while the sum is 44.

The spelling of 165315147506 in words is "one hundred sixty-five billion, three hundred fifteen million, one hundred forty-seven thousand, five hundred six".