165644131412301 has 4 divisors (see below), whose sum is σ = 220858841883072. Its totient is φ = 110429420941532.

The previous prime is 165644131412299. The next prime is 165644131412339. The reversal of 165644131412301 is 103214131446561.

165644131412301 is digitally balanced in base 2, because in such base it contains all the possibile digits an equal number of times.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4.

It is a cyclic number.

It is not a de Polignac number, because 165644131412301 - 2¹ = 165644131412299 is a prime.

It is a super-2 number, since 2×165644131412301² (a number of 29 digits) contains 22 as substring.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165644131412351) 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, 27607355235381 + ... + 27607355235386.

It is an arithmetic number, because the mean of its divisors is an integer number (55214710470768).

Almost surely, 2^{165644131412301} is an apocalyptic number.

It is an amenable number.

165644131412301 is a deficient number, since it is larger than the sum of its proper divisors (55214710470771).

165644131412301 is an equidigital number, since it uses as much as digits as its factorization.

165644131412301 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 55214710470770.

The product of its (nonzero) digits is 207360, while the sum is 42.

Adding to 165644131412301 its reverse (103214131446561), we get a palindrome (268858262858862).

The spelling of 165644131412301 in words is "one hundred sixty-five trillion, six hundred forty-four billion, one hundred thirty-one million, four hundred twelve thousand, three hundred one".