165006476545 has 4 divisors (see below), whose sum is σ = 198007771860. Its totient is φ = 132005181232.

The previous prime is 165006476497. The next prime is 165006476561. The reversal of 165006476545 is 545674600561.

It is a semiprime because it is the product of two primes.

It can be written as a sum of positive squares in 2 ways, for example, as 18997660224 + 146008816321 = 137832^2 + 382111^2 .

It is a cyclic number.

It is not a de Polignac number, because 165006476545 - 2²³ = 164998087937 is a prime.

It is an unprimeable number.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16500647650 + ... + 16500647659.

It is an arithmetic number, because the mean of its divisors is an integer number (49501942965).

Almost surely, 2^165006476545 is an apocalyptic number.

It is an amenable number.

165006476545 is a deficient number, since it is larger than the sum of its proper divisors (33001295315).

165006476545 is an equidigital number, since it uses as much as digits as its factorization.

165006476545 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 33001295314.

The product of its (nonzero) digits is 3024000, while the sum is 49.

The spelling of 165006476545 in words is "one hundred sixty-five billion, six million, four hundred seventy-six thousand, five hundred forty-five".