165850003853 has 4 divisors (see below), whose sum is σ = 168121921788. Its totient is φ = 163578085920.

The previous prime is 165850003831. The next prime is 165850003867. The reversal of 165850003853 is 358300058561.

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 37103234884 + 128746768969 = 192622^2 + 358813^2 .

It is a cyclic number.

It is not a de Polignac number, because 165850003853 - 2¹⁴ = 165849987469 is a prime.

It is a super-2 number, since 2×165850003853² (a number of 23 digits) contains 22 as substring.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165850002853) 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, 1135958858 + ... + 1135959003.

It is an arithmetic number, because the mean of its divisors is an integer number (42030480447).

Almost surely, 2^165850003853 is an apocalyptic number.

It is an amenable number.

165850003853 is a deficient number, since it is larger than the sum of its proper divisors (2271917935).

165850003853 is an equidigital number, since it uses as much as digits as its factorization.

165850003853 is an odious number, because the sum of its binary digits is odd.

The sum of its prime factors is 2271917934.

The product of its (nonzero) digits is 432000, while the sum is 44.

The spelling of 165850003853 in words is "one hundred sixty-five billion, eight hundred fifty million, three thousand, eight hundred fifty-three".