165481789 has 8 divisors (see below), whose sum is σ = 180704160. Its totient is φ = 150289200.

The previous prime is 165481787. The next prime is 165481793. The reversal of 165481789 is 987184561.

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

It is a cyclic number.

It is not a de Polignac number, because 165481789 - 2¹ = 165481787 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165481787) 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, 5107 + ... + 18895.

It is an arithmetic number, because the mean of its divisors is an integer number (22588020).

Almost surely, 2^165481789 is an apocalyptic number.

It is an amenable number.

165481789 is a deficient number, since it is larger than the sum of its proper divisors (15222371).

165481789 is a wasteful number, since it uses less digits than its factorization.

165481789 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 14891.

The product of its digits is 483840, while the sum is 49.

The square root of 165481789 is about 12863.9725201821. The cubic root of 165481789 is about 549.0139788058.

The spelling of 165481789 in words is "one hundred sixty-five million, four hundred eighty-one thousand, seven hundred eighty-nine".