165385263287 has 4 divisors (see below), whose sum is σ = 165394313616. Its totient is φ = 165376212960.

The previous prime is 165385263217. The next prime is 165385263289. The reversal of 165385263287 is 782362583561.

It is a happy number.

It is a semiprime because it is the product of two primes, and also an emirpimes, since its reverse is a distinct semiprime: 782362583561 = 13 ⋅60181737197.

It is a cyclic number.

It is not a de Polignac number, because 165385263287 - 2⁸ = 165385263031 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 (165385263289) 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, 4497698 + ... + 4534319.

It is an arithmetic number, because the mean of its divisors is an integer number (41348578404).

Almost surely, 2^165385263287 is an apocalyptic number.

165385263287 is a deficient number, since it is larger than the sum of its proper divisors (9050329).

165385263287 is an equidigital number, since it uses as much as digits as its factorization.

165385263287 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 9050328.

The product of its digits is 14515200, while the sum is 56.

The spelling of 165385263287 in words is "one hundred sixty-five billion, three hundred eighty-five million, two hundred sixty-three thousand, two hundred eighty-seven".