165785477297 has 4 divisors (see below), whose sum is σ = 180856884336. Its totient is φ = 150714070260.

The previous prime is 165785477279. The next prime is 165785477309. The reversal of 165785477297 is 792774587561.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165785477297 - 2⁶ = 165785477233 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165785470297) by changing a digit.

It is a pernicious number, because its binary representation contains a prime number (17) of ones.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 7535703503 + ... + 7535703524.

It is an arithmetic number, because the mean of its divisors is an integer number (45214221084).

Almost surely, 2^165785477297 is an apocalyptic number.

It is an amenable number.

165785477297 is a deficient number, since it is larger than the sum of its proper divisors (15071407039).

165785477297 is a wasteful number, since it uses less digits than its factorization.

165785477297 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 15071407038.

The product of its digits is 207446400, while the sum is 68.

The spelling of 165785477297 in words is "one hundred sixty-five billion, seven hundred eighty-five million, four hundred seventy-seven thousand, two hundred ninety-seven".