165332320515321 has 8 divisors (see below), whose sum is σ = 220443285502464. Its totient is φ = 110221451269200.

The previous prime is 165332320515319. The next prime is 165332320515337. The reversal of 165332320515321 is 123515023233561.

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

It is not a de Polignac number, because 165332320515321 - 2¹ = 165332320515319 is a prime.

It is not an unprimeable number, because it can be changed into a prime (165332320515361) 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, 19804026 + ... + 26886131.

It is an arithmetic number, because the mean of its divisors is an integer number (27555410687808).

Almost surely, 2^{165332320515321} is an apocalyptic number.

It is an amenable number.

165332320515321 is a deficient number, since it is larger than the sum of its proper divisors (55110964987143).

165332320515321 is a wasteful number, since it uses less digits than its factorization.

165332320515321 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 47870511.

The product of its (nonzero) digits is 486000, while the sum is 42.

Adding to 165332320515321 its reverse (123515023233561), we get a palindrome (288847343748882).

The spelling of 165332320515321 in words is "one hundred sixty-five trillion, three hundred thirty-two billion, three hundred twenty million, five hundred fifteen thousand, three hundred twenty-one".