165765018965 has 16 divisors (see below), whose sum is σ = 244822182528. Its totient is φ = 104923791936.

The previous prime is 165765018943. The next prime is 165765019003. The reversal of 165765018965 is 569810567561.

It is a happy number.

It is a cyclic number.

It is not a de Polignac number, because 165765018965 - 2¹⁴ = 165765002581 is a prime.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 15 ways as a sum of consecutive naturals, for example, 182158907 + ... + 182159816.

It is an arithmetic number, because the mean of its divisors is an integer number (15301386408).

Almost surely, 2^165765018965 is an apocalyptic number.

It is an amenable number.

165765018965 is a deficient number, since it is larger than the sum of its proper divisors (79057163563).

165765018965 is a wasteful number, since it uses less digits than its factorization.

165765018965 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 364318748.

The product of its (nonzero) digits is 13608000, while the sum is 59.

The spelling of 165765018965 in words is "one hundred sixty-five billion, seven hundred sixty-five million, eighteen thousand, nine hundred sixty-five".