165404011015 has 16 divisors (see below), whose sum is σ = 199649399040. Its totient is φ = 131547317760.

The previous prime is 165404011009. The next prime is 165404011033. The reversal of 165404011015 is 510110404561.

It is not a de Polignac number, because 165404011015 - 2³ = 165404011007 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 2765962 + ... + 2825128.

It is an arithmetic number, because the mean of its divisors is an integer number (12478087440).

Almost surely, 2^165404011015 is an apocalyptic number.

165404011015 is a deficient number, since it is larger than the sum of its proper divisors (34245388025).

165404011015 is a wasteful number, since it uses less digits than its factorization.

165404011015 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 62442.

The product of its (nonzero) digits is 2400, while the sum is 28.

Adding to 165404011015 its reverse (510110404561), we get a palindrome (675514415576).

The spelling of 165404011015 in words is "one hundred sixty-five billion, four hundred four million, eleven thousand, fifteen".