165494785 has 4 divisors (see below), whose sum is σ = 198593748. Its totient is φ = 132395824.

The previous prime is 165494773. The next prime is 165494801. The reversal of 165494785 is 587494561.

It is a happy number.

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 123387664 + 42107121 = 11108^2 + 6489^2 .

It is a cyclic number.

It is not a de Polignac number, because 165494785 - 2⁷ = 165494657 is a prime.

It is a Smith number, since the sum of its digits (49) coincides with the sum of the digits of its prime factors. Since it is squarefree, it is also a hoax number.

It is an alternating number because its digits alternate between odd and even.

It is a Duffinian number.

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, 16549474 + ... + 16549483.

It is an arithmetic number, because the mean of its divisors is an integer number (49648437).

It is a Proth number, since it is equal to 10101 ⋅ 2¹⁴ + 1 and 10101 < 2¹⁴.

Almost surely, 2^165494785 is an apocalyptic number.

It is an amenable number.

165494785 is a deficient number, since it is larger than the sum of its proper divisors (33098963).

165494785 is an equidigital number, since it uses as much as digits as its factorization.

165494785 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33098962.

The product of its digits is 1209600, while the sum is 49.

The square root of 165494785 is about 12864.4776419410. The cubic root of 165494785 is about 549.0283505764.

The spelling of 165494785 in words is "one hundred sixty-five million, four hundred ninety-four thousand, seven hundred eighty-five".