165015550510665 has 16 divisors (see below), whose sum is σ = 264498893183808. Its totient is φ = 87850289483456.

The previous prime is 165015550510567. The next prime is 165015550510669. The reversal of 165015550510665 is 566015055510561.

It is a cyclic number.

It is not a de Polignac number, because 165015550510665 - 2⁸ = 165015550510409 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165015550510669) by changing a digit.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 9875249007 + ... + 9875265716.

It is an arithmetic number, because the mean of its divisors is an integer number (16531180823988).

Almost surely, 2^{165015550510665} is an apocalyptic number.

165015550510665 is a gapful number since it is divisible by the number (15) formed by its first and last digit.

It is an amenable number.

165015550510665 is a deficient number, since it is larger than the sum of its proper divisors (99483342673143).

165015550510665 is a wasteful number, since it uses less digits than its factorization.

165015550510665 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 19750515288.

The product of its (nonzero) digits is 3375000, while the sum is 51.

The spelling of 165015550510665 in words is "one hundred sixty-five trillion, fifteen billion, five hundred fifty million, five hundred ten thousand, six hundred sixty-five".