165613400603 has 8 divisors (see below), whose sum is σ = 189881053440. Its totient is φ = 141497896680.

The previous prime is 165613400581. The next prime is 165613400609. The reversal of 165613400603 is 306004316561.

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

It is not a de Polignac number, because 165613400603 - 2¹⁰ = 165613399579 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165613400609) by changing a digit.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 38034893 + ... + 38039246.

It is an arithmetic number, because the mean of its divisors is an integer number (23735131680).

Almost surely, 2^165613400603 is an apocalyptic number.

165613400603 is a deficient number, since it is larger than the sum of its proper divisors (24267652837).

165613400603 is an equidigital number, since it uses as much as digits as its factorization.

165613400603 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 76074457.

The product of its (nonzero) digits is 38880, while the sum is 35.

The spelling of 165613400603 in words is "one hundred sixty-five billion, six hundred thirteen million, four hundred thousand, six hundred three".