165610515161615 has 8 divisors (see below), whose sum is σ = 201531669154848. Its totient is φ = 130622378155360.

The previous prime is 165610515161591. The next prime is 165610515161627. The reversal of 165610515161615 is 516161515016561.

It is a sphenic number, since it is the product of 3 distinct primes.

It is not a de Polignac number, because 165610515161615 - 2⁸ = 165610515161359 is a prime.

It is a Duffinian number.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 233254246352 + ... + 233254247061.

It is an arithmetic number, because the mean of its divisors is an integer number (25191458644356).

Almost surely, 2^{165610515161615} is an apocalyptic number.

165610515161615 is a deficient number, since it is larger than the sum of its proper divisors (35921153993233).

165610515161615 is an equidigital number, since it uses as much as digits as its factorization.

165610515161615 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 466508493489.

The product of its (nonzero) digits is 810000, while the sum is 50.

The spelling of 165610515161615 in words is "one hundred sixty-five trillion, six hundred ten billion, five hundred fifteen million, one hundred sixty-one thousand, six hundred fifteen".