165140563 has 8 divisors (see below), whose sum is σ = 192748032. Its totient is φ = 138537096.

The previous prime is 165140561. The next prime is 165140581. The reversal of 165140563 is 365041561.

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 165140563 - 2¹ = 165140561 is a prime.

It is a Duffinian number.

It is not an unprimeable number, because it can be changed into a prime (165140561) 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, 250645 + ... + 251302.

It is an arithmetic number, because the mean of its divisors is an integer number (24093504).

Almost surely, 2^165140563 is an apocalyptic number.

165140563 is a deficient number, since it is larger than the sum of its proper divisors (27607469).

165140563 is an equidigital number, since it uses as much as digits as its factorization.

165140563 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 502001.

The product of its (nonzero) digits is 10800, while the sum is 31.

The square root of 165140563 is about 12850.7028212468. The cubic root of 165140563 is about 548.6363607060.

The spelling of 165140563 in words is "one hundred sixty-five million, one hundred forty thousand, five hundred sixty-three".