165110314331645 has 4 divisors (see below), whose sum is σ = 198132377197980. Its totient is φ = 132088251465312.

The previous prime is 165110314331593. The next prime is 165110314331647. The reversal of 165110314331645 is 546133413011561.

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 82114515630436 + 82995798701209 = 9061706^2 + 9110203^2 .

It is a cyclic number.

It is not a de Polignac number, because 165110314331645 - 2¹² = 165110314327549 is a prime.

It is a super-2 number, since 2×165110314331645² (a number of 29 digits) contains 22 as substring.

It is a junction number, because it is equal to n+sod(n) for n = 165110314331596 and 165110314331605.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165110314331647) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 16511031433160 + ... + 16511031433169.

It is an arithmetic number, because the mean of its divisors is an integer number (49533094299495).

Almost surely, 2^{165110314331645} is an apocalyptic number.

It is an amenable number.

165110314331645 is a deficient number, since it is larger than the sum of its proper divisors (33022062866335).

165110314331645 is an equidigital number, since it uses as much as digits as its factorization.

165110314331645 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 33022062866334.

The product of its (nonzero) digits is 388800, while the sum is 44.

The spelling of 165110314331645 in words is "one hundred sixty-five trillion, one hundred ten billion, three hundred fourteen million, three hundred thirty-one thousand, six hundred forty-five".