165305013407 has 4 divisors (see below), whose sum is σ = 165518862840. Its totient is φ = 165091163976.

The previous prime is 165305013403. The next prime is 165305013409. The reversal of 165305013407 is 704310503561.

It is a semiprime because it is the product of two primes.

It is a cyclic number.

It is not a de Polignac number, because 165305013407 - 2² = 165305013403 is a prime.

It is a Duffinian number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (165305013403) 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, 106923557 + ... + 106925102.

It is an arithmetic number, because the mean of its divisors is an integer number (41379715710).

Almost surely, 2^165305013407 is an apocalyptic number.

165305013407 is a deficient number, since it is larger than the sum of its proper divisors (213849433).

165305013407 is an equidigital number, since it uses as much as digits as its factorization.

165305013407 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 213849432.

The product of its (nonzero) digits is 37800, while the sum is 35.

Adding to 165305013407 its reverse (704310503561), we get a palindrome (869615516968).

The spelling of 165305013407 in words is "one hundred sixty-five billion, three hundred five million, thirteen thousand, four hundred seven".