165055516515615 has 24 divisors (see below), whose sum is σ = 290279453842224. Its totient is φ = 80026917097600.

The previous prime is 165055516515577. The next prime is 165055516515623. The reversal of 165055516515615 is 516515615550561.

It is not a de Polignac number, because 165055516515615 - 2¹⁵ = 165055516482847 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 (29) of ones.

It is a polite number, since it can be written in 23 ways as a sum of consecutive naturals, for example, 45469837446 + ... + 45469841075.

It is an arithmetic number, because the mean of its divisors is an integer number (12094977243426).

Almost surely, 2^{165055516515615} is an apocalyptic number.

165055516515615 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

165055516515615 is a deficient number, since it is larger than the sum of its proper divisors (125223937326609).

165055516515615 is a wasteful number, since it uses less digits than its factorization.

165055516515615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 90939678551 (or 90939678540 counting only the distinct ones).

The product of its (nonzero) digits is 16875000, while the sum is 57.

The spelling of 165055516515615 in words is "one hundred sixty-five trillion, fifty-five billion, five hundred sixteen million, five hundred fifteen thousand, six hundred fifteen".